diff --git a/Documentation/rest-api-changes.txt b/Documentation/rest-api-changes.txt
index b609643..d83ef0e 100644
--- a/Documentation/rest-api-changes.txt
+++ b/Documentation/rest-api-changes.txt
@@ -6535,6 +6535,9 @@
 Actions the caller might be able to perform on this revision. The
 information is a map of view name to link:#action-info[ActionInfo]
 entities.
+|`submit_records`             ||
+List of the link:rest-api-changes.html#submit-record-info[SubmitRecordInfo]
+containing the submit records for the change at the latest patchset.
 |`requirements`             |optional|
 List of the link:rest-api-changes.html#requirement[requirements] to be met before this change
 can be submitted. This field is deprecated in favour of `submit_requirements`.
@@ -8176,6 +8179,37 @@
 the failure of the rule predicate.
 |===========================
 
+[[submit-record-info]]
+=== SubmitRecordInfo
+The `SubmitRecordInfo` entity describes results from a submit_rule.
+
+[options="header",cols="1,^1,5"]
+|===========================
+|Field Name      ||Description
+|`rule_name`||
+The name of the submit rule that created this submit record. The submit rule is
+specified in the form of "$plugin~$rule" where `$plugin` is the plugin name
+and `$rule` is the name of the class that implemented the submit rule.
+|`status`||
+`OK`, the change can be submitted. +
+`NOT_READY`, additional labels are required before submit. +
+`CLOSED`, closed changes cannot be submitted. +
+`FORCED`, the change was submitted bypassing the submit rule. +
+`RULE_ERROR`, rule code failed with an error.
+|`labels`|optional|
+A list of labels, each containing the following fields. +
+  * `label`: the label name. +
+  * `status`: the label status: {`OK`, `REJECT`, `MAY`, `NEED`, `IMPOSSIBLE`}. +
+  * `appliedBy`: the link:rest-api-accounts.html#account-info[AccountInfo]
+  that applied the vote to the label.
+|`requirements`|optional|
+List of the link:rest-api-changes.html#requirement[requirements] to be met
+before this change can be submitted.
+|`error_message`|optional|
+When status is RULE_ERROR this message provides some text describing
+the failure of the rule predicate.
+|===========================
+
 [[submit-requirement-expression-info]]
 === SubmitRequirementExpressionInfo
 The `SubmitRequirementExpressionInfo` describes the result of evaluating a
diff --git a/java/com/google/gerrit/acceptance/ExtensionRegistry.java b/java/com/google/gerrit/acceptance/ExtensionRegistry.java
index 85c4c13..1e5598e 100644
--- a/java/com/google/gerrit/acceptance/ExtensionRegistry.java
+++ b/java/com/google/gerrit/acceptance/ExtensionRegistry.java
@@ -25,6 +25,8 @@
 import com.google.gerrit.extensions.events.GitReferenceUpdatedListener;
 import com.google.gerrit.extensions.events.GroupIndexedListener;
 import com.google.gerrit.extensions.events.ProjectIndexedListener;
+import com.google.gerrit.extensions.events.ReviewerAddedListener;
+import com.google.gerrit.extensions.events.ReviewerDeletedListener;
 import com.google.gerrit.extensions.events.RevisionCreatedListener;
 import com.google.gerrit.extensions.events.TopicEditedListener;
 import com.google.gerrit.extensions.events.WorkInProgressStateChangedListener;
@@ -91,6 +93,8 @@
   private final DynamicMap<ProjectConfigEntry> pluginConfigEntries;
   private final DynamicSet<PluginPushOption> pluginPushOptions;
   private final DynamicSet<OnPostReview> onPostReviews;
+  private final DynamicSet<ReviewerAddedListener> reviewerAddedListeners;
+  private final DynamicSet<ReviewerDeletedListener> reviewerDeletedListeners;
 
   @Inject
   ExtensionRegistry(
@@ -125,7 +129,9 @@
       DynamicMap<PluginProjectPermissionDefinition> pluginProjectPermissionDefinitions,
       DynamicMap<ProjectConfigEntry> pluginConfigEntries,
       DynamicSet<PluginPushOption> pluginPushOption,
-      DynamicSet<OnPostReview> onPostReviews) {
+      DynamicSet<OnPostReview> onPostReviews,
+      DynamicSet<ReviewerAddedListener> reviewerAddedListeners,
+      DynamicSet<ReviewerDeletedListener> reviewerDeletedListeners) {
     this.accountIndexedListeners = accountIndexedListeners;
     this.changeIndexedListeners = changeIndexedListeners;
     this.groupIndexedListeners = groupIndexedListeners;
@@ -158,6 +164,8 @@
     this.pluginConfigEntries = pluginConfigEntries;
     this.pluginPushOptions = pluginPushOption;
     this.onPostReviews = onPostReviews;
+    this.reviewerAddedListeners = reviewerAddedListeners;
+    this.reviewerDeletedListeners = reviewerDeletedListeners;
   }
 
   public Registration newRegistration() {
@@ -302,6 +310,14 @@
       return add(onPostReviews, onPostReview);
     }
 
+    public Registration add(ReviewerAddedListener reviewerAddedListener) {
+      return add(reviewerAddedListeners, reviewerAddedListener);
+    }
+
+    public Registration add(ReviewerDeletedListener reviewerDeletedListener) {
+      return add(reviewerDeletedListeners, reviewerDeletedListener);
+    }
+
     private <T> Registration add(DynamicSet<T> dynamicSet, T extension) {
       return add(dynamicSet, extension, "gerrit");
     }
diff --git a/java/com/google/gerrit/extensions/common/ChangeInfo.java b/java/com/google/gerrit/extensions/common/ChangeInfo.java
index 6afe8ac..2bb3dd7 100644
--- a/java/com/google/gerrit/extensions/common/ChangeInfo.java
+++ b/java/com/google/gerrit/extensions/common/ChangeInfo.java
@@ -112,6 +112,7 @@
   public List<PluginDefinedInfo> plugins;
   public Collection<TrackingIdInfo> trackingIds;
   public Collection<LegacySubmitRequirementInfo> requirements;
+  public Collection<SubmitRecordInfo> submitRecords;
   public Collection<SubmitRequirementResultInfo> submitRequirements;
 
   public ChangeInfo() {}
diff --git a/java/com/google/gerrit/extensions/common/SubmitRecordInfo.java b/java/com/google/gerrit/extensions/common/SubmitRecordInfo.java
new file mode 100644
index 0000000..09c9841
--- /dev/null
+++ b/java/com/google/gerrit/extensions/common/SubmitRecordInfo.java
@@ -0,0 +1,48 @@
+// Copyright (C) 2021 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.gerrit.extensions.common;
+
+import java.util.List;
+
+/** API response containing a {@link com.google.gerrit.entities.SubmitRecord} entity. */
+public class SubmitRecordInfo {
+  public enum Status {
+    OK,
+    NOT_READY,
+    CLOSED,
+    FORCED,
+    RULE_ERROR
+  }
+
+  public static class Label {
+    public enum Status {
+      OK,
+      REJECT,
+      NEED,
+      MAY,
+      IMPOSSIBLE
+    }
+
+    public String label;
+    public Status status;
+    public AccountInfo appliedBy;
+  }
+
+  public String ruleName;
+  public Status status;
+  public List<Label> labels;
+  public List<LegacySubmitRequirementInfo> requirements;
+  public String errorMessage;
+}
diff --git a/java/com/google/gerrit/server/CommentsUtil.java b/java/com/google/gerrit/server/CommentsUtil.java
index b18f499..3d3603f 100644
--- a/java/com/google/gerrit/server/CommentsUtil.java
+++ b/java/com/google/gerrit/server/CommentsUtil.java
@@ -450,12 +450,6 @@
   /**
    * Get NoteDb draft refs for a change.
    *
-   * <p>Works if NoteDb is not enabled, but the results are not meaningful.
-   *
-   * <p>This is just a simple ref scan, so the results may potentially include refs for zombie draft
-   * comments. A zombie draft is one which has been published but the write to delete the draft ref
-   * from All-Users failed.
-   *
    * @param changeId change ID.
    * @return raw refs from All-Users repo.
    */
diff --git a/java/com/google/gerrit/server/change/AddReviewersOp.java b/java/com/google/gerrit/server/change/AddReviewersOp.java
index a333ce5..cbbd01a 100644
--- a/java/com/google/gerrit/server/change/AddReviewersOp.java
+++ b/java/com/google/gerrit/server/change/AddReviewersOp.java
@@ -219,8 +219,13 @@
               .map(r -> accountCache.get(r.accountId()))
               .flatMap(Streams::stream)
               .collect(toList());
-      reviewerAdded.fire(
-          ctx.getChangeData(change), patchSet, reviewers, ctx.getAccount(), ctx.getWhen());
+      eventSender =
+          () ->
+              reviewerAdded.fire(
+                  ctx.getChangeData(change), patchSet, reviewers, ctx.getAccount(), ctx.getWhen());
+      if (sendEvent) {
+        sendEvent();
+      }
     }
   }
 }
diff --git a/java/com/google/gerrit/server/change/ChangeJson.java b/java/com/google/gerrit/server/change/ChangeJson.java
index 5efcf59..db25dc7 100644
--- a/java/com/google/gerrit/server/change/ChangeJson.java
+++ b/java/com/google/gerrit/server/change/ChangeJson.java
@@ -79,6 +79,7 @@
 import com.google.gerrit.extensions.common.ProblemInfo;
 import com.google.gerrit.extensions.common.ReviewerUpdateInfo;
 import com.google.gerrit.extensions.common.RevisionInfo;
+import com.google.gerrit.extensions.common.SubmitRecordInfo;
 import com.google.gerrit.extensions.common.SubmitRequirementExpressionInfo;
 import com.google.gerrit.extensions.common.SubmitRequirementResultInfo;
 import com.google.gerrit.extensions.common.TrackingIdInfo;
@@ -369,6 +370,14 @@
     return reqInfos;
   }
 
+  private Collection<SubmitRecordInfo> submitRecordsFor(ChangeData cd) {
+    List<SubmitRecordInfo> submitRecordInfos = new ArrayList<>();
+    for (SubmitRecord record : cd.submitRecords(SUBMIT_RULE_OPTIONS_STRICT)) {
+      submitRecordInfos.add(submitRecordToInfo(record));
+    }
+    return submitRecordInfos;
+  }
+
   private static Collection<SubmitRequirementResultInfo> submitRequirementsFor(ChangeData cd) {
     Collection<SubmitRequirementResultInfo> reqInfos = new ArrayList<>();
     Map<SubmitRequirement, SubmitRequirementResult> requirements = cd.submitRequirements();
@@ -383,6 +392,34 @@
     return new LegacySubmitRequirementInfo(status.name(), req.fallbackText(), req.type());
   }
 
+  private SubmitRecordInfo submitRecordToInfo(SubmitRecord record) {
+    SubmitRecordInfo info = new SubmitRecordInfo();
+    if (record.status != null) {
+      info.status = SubmitRecordInfo.Status.valueOf(record.status.name());
+    }
+    info.ruleName = record.ruleName;
+    info.errorMessage = record.errorMessage;
+    if (record.labels != null) {
+      info.labels = new ArrayList<>();
+      for (SubmitRecord.Label label : record.labels) {
+        SubmitRecordInfo.Label labelInfo = new SubmitRecordInfo.Label();
+        labelInfo.label = label.label;
+        if (label.status != null) {
+          labelInfo.status = SubmitRecordInfo.Label.Status.valueOf(label.status.name());
+        }
+        labelInfo.appliedBy = accountLoader.get(label.appliedBy);
+        info.labels.add(labelInfo);
+      }
+    }
+    if (record.requirements != null) {
+      info.requirements = new ArrayList<>();
+      for (LegacySubmitRequirement requirement : record.requirements) {
+        info.requirements.add(requirementToInfo(requirement, record.status));
+      }
+    }
+    return info;
+  }
+
   private static SubmitRequirementResultInfo submitRequirementToInfo(
       SubmitRequirement req, SubmitRequirementResult result) {
     SubmitRequirementResultInfo info = new SubmitRequirementResultInfo();
@@ -662,6 +699,7 @@
 
     out.labels = labelsJson.labelsFor(accountLoader, cd, has(LABELS), has(DETAILED_LABELS));
     out.requirements = requirementsFor(cd);
+    out.submitRecords = submitRecordsFor(cd);
     if (has(SUBMIT_REQUIREMENTS)) {
       out.submitRequirements = submitRequirementsFor(cd);
     }
diff --git a/java/com/google/gerrit/server/change/DeleteReviewerOp.java b/java/com/google/gerrit/server/change/DeleteReviewerOp.java
index a26f107..1e40429 100644
--- a/java/com/google/gerrit/server/change/DeleteReviewerOp.java
+++ b/java/com/google/gerrit/server/change/DeleteReviewerOp.java
@@ -202,16 +202,23 @@
             "Cannot email update for change %s", currChange.getId());
       }
     }
-    reviewerDeleted.fire(
-        ctx.getChangeData(currChange),
-        patchSet,
-        accountCache.get(reviewer.id()).orElse(AccountState.forAccount(reviewer)),
-        ctx.getAccount(),
-        mailMessage,
-        newApprovals,
-        oldApprovals,
-        notify.handling(),
-        ctx.getWhen());
+
+    NotifyHandling notifyHandling = notify.handling();
+    eventSender =
+        () ->
+            reviewerDeleted.fire(
+                ctx.getChangeData(currChange),
+                patchSet,
+                accountCache.get(reviewer.id()).orElse(AccountState.forAccount(reviewer)),
+                ctx.getAccount(),
+                mailMessage,
+                newApprovals,
+                oldApprovals,
+                notifyHandling,
+                ctx.getWhen());
+    if (sendEvent) {
+      sendEvent();
+    }
   }
 
   private Iterable<PatchSetApproval> approvals(ChangeContext ctx, Account.Id accountId) {
diff --git a/java/com/google/gerrit/server/change/ReviewerOp.java b/java/com/google/gerrit/server/change/ReviewerOp.java
index 716ac5e..12227c2 100644
--- a/java/com/google/gerrit/server/change/ReviewerOp.java
+++ b/java/com/google/gerrit/server/change/ReviewerOp.java
@@ -32,6 +32,8 @@
 
 public class ReviewerOp implements BatchUpdateOp {
   protected boolean sendEmail = true;
+  protected boolean sendEvent = true;
+  protected Runnable eventSender = () -> {};
   protected PatchSet patchSet;
   protected Result opResult;
 
@@ -42,6 +44,14 @@
     this.sendEmail = false;
   }
 
+  public void suppressEvent() {
+    this.sendEvent = false;
+  }
+
+  public void sendEvent() {
+    eventSender.run();
+  }
+
   void setPatchSet(PatchSet patchSet) {
     this.patchSet = requireNonNull(patchSet);
   }
diff --git a/java/com/google/gerrit/server/notedb/ChangeNotes.java b/java/com/google/gerrit/server/notedb/ChangeNotes.java
index 2d9b014..f2034af 100644
--- a/java/com/google/gerrit/server/notedb/ChangeNotes.java
+++ b/java/com/google/gerrit/server/notedb/ChangeNotes.java
@@ -32,7 +32,6 @@
 import com.google.common.collect.ListMultimap;
 import com.google.common.collect.Lists;
 import com.google.common.collect.MultimapBuilder;
-import com.google.common.collect.Multimaps;
 import com.google.common.collect.Ordering;
 import com.google.common.collect.Sets;
 import com.google.common.collect.Sets.SetView;
@@ -523,12 +522,7 @@
   public ImmutableListMultimap<ObjectId, HumanComment> getDraftComments(
       Account.Id author, @Nullable Ref ref) {
     loadDraftComments(author, ref);
-    // Filter out any zombie draft comments. These are drafts that are also in
-    // the published map, and arise when the update to All-Users to delete them
-    // during the publish operation failed.
-    return ImmutableListMultimap.copyOf(
-        Multimaps.filterEntries(
-            draftCommentNotes.getComments(), e -> !getCommentKeys().contains(e.getValue().key)));
+    return draftCommentNotes.getComments();
   }
 
   public ImmutableListMultimap<ObjectId, RobotComment> getRobotComments() {
diff --git a/java/com/google/gerrit/server/notedb/CommitRewriter.java b/java/com/google/gerrit/server/notedb/CommitRewriter.java
index 7d743dc..3cbe546 100644
--- a/java/com/google/gerrit/server/notedb/CommitRewriter.java
+++ b/java/com/google/gerrit/server/notedb/CommitRewriter.java
@@ -20,6 +20,7 @@
 import static com.google.gerrit.server.notedb.ChangeNoteUtil.FOOTER_LABEL;
 import static com.google.gerrit.server.notedb.ChangeNoteUtil.FOOTER_REAL_USER;
 import static com.google.gerrit.server.notedb.ChangeNoteUtil.FOOTER_SUBMITTED_WITH;
+import static com.google.gerrit.server.notedb.ChangeNoteUtil.FOOTER_TAG;
 import static com.google.gerrit.server.util.AccountTemplateUtil.ACCOUNT_TEMPLATE_PATTERN;
 import static com.google.gerrit.server.util.AccountTemplateUtil.ACCOUNT_TEMPLATE_REGEX;
 
@@ -39,6 +40,7 @@
 import com.google.gerrit.entities.SubmitRecord;
 import com.google.gerrit.git.RefUpdateUtil;
 import com.google.gerrit.json.OutputFormat;
+import com.google.gerrit.server.ChangeMessagesUtil;
 import com.google.gerrit.server.account.AccountCache;
 import com.google.gerrit.server.account.AccountState;
 import com.google.gerrit.server.account.externalids.ExternalId;
@@ -58,7 +60,6 @@
 import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
-import java.util.Map.Entry;
 import java.util.Objects;
 import java.util.Optional;
 import java.util.Set;
@@ -170,7 +171,8 @@
       Pattern.compile("Assignee changed from: (.*) to: (.*)");
 
   private static final Pattern REMOVED_REVIEWER_PATTERN =
-      Pattern.compile("Removed (cc|reviewer) (.*)(\\.| with the following votes)");
+      Pattern.compile(
+          "Removed (cc|reviewer) (.*)(\\.| with the following votes:\n.*)", Pattern.DOTALL);
 
   private static final Pattern REMOVED_VOTE_PATTERN = Pattern.compile("Removed (.*) by (.*)");
 
@@ -186,12 +188,18 @@
 
   private static final Pattern ON_CODE_OWNER_ADD_REVIEWER_PATTERN =
       Pattern.compile("(.*) who was added as reviewer owns the following files");
+
+  private static final String CODE_OWNER_ADD_REVIEWER_TAG =
+      ChangeMessagesUtil.AUTOGENERATED_BY_GERRIT_TAG_PREFIX + "code-owners:addReviewer";
+
   private static final String ON_CODE_OWNER_APPROVAL_REGEX = "code-owner approved by (.*):";
   private static final String ON_CODE_OWNER_OVERRIDE_REGEX =
       "code-owners submit requirement .* overridden by (.*)";
 
   private static final Pattern ON_CODE_OWNER_REVIEW_PATTERN =
       Pattern.compile(ON_CODE_OWNER_APPROVAL_REGEX + "|" + ON_CODE_OWNER_OVERRIDE_REGEX);
+  private static final Pattern ON_CODE_OWNER_POST_REVIEW_PATTERN =
+      Pattern.compile("Patch Set [0-9]+:[\\s\\S]*By (voting|removing)[\\s\\S]*");
 
   private static final Pattern REPLY_BY_REASON_PATTERN =
       Pattern.compile("(.*) replied on the change");
@@ -386,7 +394,7 @@
     RevCommit originalCommit;
 
     boolean rewriteStarted = false;
-    ChangeFixProgress changeFixProgress = new ChangeFixProgress();
+    ChangeFixProgress changeFixProgress = new ChangeFixProgress(ref.getName());
     while ((originalCommit = revWalk.next()) != null) {
 
       changeFixProgress.updateAuthorId =
@@ -538,7 +546,9 @@
         return Optional.of(
             "Assignee deleted: "
                 + getPossibleAccountReplacement(
-                    changeFixProgress, oldAssignee, assigneeDeletedMatcher.group(1)));
+                    changeFixProgress,
+                    oldAssignee,
+                    ParsedAccountInfo.create(assigneeDeletedMatcher.group(1))));
       }
       return Optional.empty();
     }
@@ -549,7 +559,9 @@
         return Optional.of(
             "Assignee added: "
                 + getPossibleAccountReplacement(
-                    changeFixProgress, newAssignee, assigneeAddedMatcher.group(1)));
+                    changeFixProgress,
+                    newAssignee,
+                    ParsedAccountInfo.create(assigneeAddedMatcher.group(1))));
       }
       return Optional.empty();
     }
@@ -561,9 +573,13 @@
             String.format(
                 "Assignee changed from: %s to: %s",
                 getPossibleAccountReplacement(
-                    changeFixProgress, oldAssignee, assigneeChangedMatcher.group(1)),
+                    changeFixProgress,
+                    oldAssignee,
+                    ParsedAccountInfo.create(assigneeChangedMatcher.group(1))),
                 getPossibleAccountReplacement(
-                    changeFixProgress, newAssignee, assigneeChangedMatcher.group(2))));
+                    changeFixProgress,
+                    newAssignee,
+                    ParsedAccountInfo.create(assigneeChangedMatcher.group(2)))));
       }
       return Optional.empty();
     }
@@ -576,7 +592,7 @@
     }
     Matcher matcher = REMOVED_REVIEWER_PATTERN.matcher(originalChangeMessage);
 
-    if (matcher.find() && !ACCOUNT_TEMPLATE_PATTERN.matcher(matcher.group(2)).matches()) {
+    if (matcher.matches() && !ACCOUNT_TEMPLATE_PATTERN.matcher(matcher.group(2)).matches()) {
       // Since we do not use change messages for reviewer updates on UI, it does not matter what we
       // rewrite it to.
       return Optional.of(originalChangeMessage.substring(0, matcher.end(1)));
@@ -599,7 +615,7 @@
               "Removed %s by %s",
               matcher.group(1),
               getPossibleAccountReplacement(
-                  changeFixProgress, reviewer, getNameFromNameEmail(matcher.group(2)))));
+                  changeFixProgress, reviewer, getAccountInfoFromNameEmail(matcher.group(2)))));
     }
     return Optional.empty();
   }
@@ -612,21 +628,27 @@
     }
     String[] lines = originalChangeMessage.split("\\r?\\n");
     StringBuilder fixedLines = new StringBuilder();
+    boolean anyFixed = false;
     for (int i = 1; i < lines.length; i++) {
       if (lines[i].isEmpty()) {
         continue;
       }
       Matcher matcher = REMOVED_VOTES_CHANGE_MESSAGE_PATTERN.matcher(lines[i]);
+      String replacementLine = lines[i];
       if (matcher.matches() && !NON_REPLACE_ACCOUNT_PATTERN.matcher(matcher.group(2)).matches()) {
-        fixedLines.append(
+        anyFixed = true;
+        replacementLine =
             String.format(
                 "* %s by %s\n",
                 matcher.group(1),
                 getPossibleAccountReplacement(
-                    changeFixProgress, Optional.empty(), getNameFromNameEmail(matcher.group(2)))));
+                    changeFixProgress,
+                    Optional.empty(),
+                    getAccountInfoFromNameEmail(matcher.group(2))));
       }
+      fixedLines.append(replacementLine);
     }
-    if (fixedLines.length() == 0) {
+    if (!anyFixed) {
       return Optional.empty();
     }
     return Optional.of(REMOVED_VOTES_CHANGE_MESSAGE_START + "\n" + fixedLines);
@@ -687,7 +709,8 @@
     while (onAddReviewerMatcher.find()) {
       String reviewerName = normalizeOnCodeOwnerAddReviewerMatch(onAddReviewerMatcher.group(1));
       String replacementName =
-          getPossibleAccountReplacement(changeFixProgress, Optional.empty(), reviewerName);
+          getPossibleAccountReplacement(
+              changeFixProgress, Optional.empty(), ParsedAccountInfo.create(reviewerName));
       onAddReviewerMatcher.appendReplacement(
           sb, replacementName + ", who was added as reviewer owns the following files");
     }
@@ -717,7 +740,11 @@
     if (Strings.isNullOrEmpty(originalMessage)) {
       return Optional.empty();
     }
-
+    Matcher onCodeOwnerPostReviewMatcher =
+        ON_CODE_OWNER_POST_REVIEW_PATTERN.matcher(originalMessage);
+    if (!onCodeOwnerPostReviewMatcher.matches()) {
+      return Optional.empty();
+    }
     Matcher onCodeOwnerReviewMatcher = ON_CODE_OWNER_REVIEW_PATTERN.matcher(originalMessage);
     while (onCodeOwnerReviewMatcher.find()) {
       String accountName =
@@ -809,7 +836,9 @@
     for (FooterLine fl : footerLines) {
       String footerKey = fl.getKey();
       String footerValue = fl.getValue();
-      if (footerKey.equalsIgnoreCase(FOOTER_ASSIGNEE.getName())) {
+      if (footerKey.equalsIgnoreCase(FOOTER_TAG.getName())) {
+        fixProgress.tag = footerValue;
+      } else if (footerKey.equalsIgnoreCase(FOOTER_ASSIGNEE.getName())) {
         Account.Id oldAssignee = fixProgress.assigneeId;
         FixIdentResult fixedAssignee = null;
         if (footerValue.equals("")) {
@@ -940,7 +969,8 @@
       fixedChangeMessage =
           fixCodeOwnersOnReviewChangeMessage(fixProgress.updateAuthorId, originalChangeMessage);
     }
-    if (!fixedChangeMessage.isPresent()) {
+    if (!fixedChangeMessage.isPresent()
+        && Objects.equals(fixProgress.tag, CODE_OWNER_ADD_REVIEWER_TAG)) {
       fixedChangeMessage =
           fixCodeOwnersOnAddReviewerChangeMessage(fixProgress, originalChangeMessage);
     }
@@ -971,9 +1001,10 @@
   private Optional<Account.Id> parseIdent(ChangeFixProgress changeFixProgress, PersonIdent ident) {
     Optional<Account.Id> account = NoteDbUtil.parseIdent(ident);
     if (account.isPresent()) {
-      changeFixProgress.parsedAccounts.putIfAbsent(account.get(), "");
+      changeFixProgress.parsedAccounts.putIfAbsent(account.get(), Optional.empty());
     } else {
-      logger.atWarning().log("Failed to parse id %s", ident);
+      logger.atWarning().log(
+          "Fixing ref %s, failed to parse id %s", changeFixProgress.changeMetaRef, ident);
     }
     return account;
   }
@@ -1022,10 +1053,16 @@
     return fixIdentResult;
   }
 
-  /** Extracts {@link Account#getName} from {@link Account#getNameEmail} */
-  private String getNameFromNameEmail(String nameEmail) {
+  /** Extracts {@link ParsedAccountInfo} from {@link Account#getNameEmail} */
+  private ParsedAccountInfo getAccountInfoFromNameEmail(String nameEmail) {
     Matcher nameEmailMatcher = NAME_EMAIL_PATTERN.matcher(nameEmail);
-    return nameEmailMatcher.matches() ? nameEmailMatcher.group(1) : nameEmail;
+    if (!nameEmailMatcher.matches()) {
+      return ParsedAccountInfo.create(nameEmail);
+    }
+
+    return ParsedAccountInfo.create(
+        nameEmailMatcher.group(1),
+        nameEmailMatcher.group(2).substring(1, nameEmailMatcher.group(2).length() - 1));
   }
 
   /**
@@ -1038,39 +1075,73 @@
    *
    * @param changeFixProgress see {@link ChangeFixProgress}
    * @param account account that should be used for replacement, if known
-   * @param accountName {@link Account#getName} to replace.
+   * @param accountInfo {@link ParsedAccountInfo} to replace.
    * @return replacement for {@code accountName}
    */
   private String getPossibleAccountReplacement(
-      ChangeFixProgress changeFixProgress, Optional<Account.Id> account, String accountName) {
+      ChangeFixProgress changeFixProgress,
+      Optional<Account.Id> account,
+      ParsedAccountInfo accountInfo) {
     if (account.isPresent()) {
       return AccountTemplateUtil.getAccountTemplate(account.get());
     }
     // Retrieve reviewer accounts from cache and try to match by their name.
-    Map<Account.Id, AccountState> missingUserNameReviewers =
+    Map<Account.Id, AccountState> missingAccountStateReviewers =
         accountCache.get(
             changeFixProgress.parsedAccounts.entrySet().stream()
-                .filter(entry -> entry.getValue().isEmpty())
+                .filter(entry -> !entry.getValue().isPresent())
                 .map(Map.Entry::getKey)
                 .collect(ImmutableSet.toImmutableSet()));
     changeFixProgress.parsedAccounts.putAll(
-        missingUserNameReviewers.entrySet().stream()
+        missingAccountStateReviewers.entrySet().stream()
             .collect(
                 ImmutableMap.toImmutableMap(
-                    Map.Entry::getKey, e -> e.getValue().account().getName())));
-    Set<Account.Id> possibleReplacements =
-        changeFixProgress.parsedAccounts.entrySet().stream()
-            .filter(e -> e.getValue().equals(accountName))
-            .map(Entry::getKey)
-            .collect(ImmutableSet.toImmutableSet());
+                    Map.Entry::getKey, e -> Optional.ofNullable(e.getValue()))));
+    Map<Account.Id, AccountState> possibleReplacements = ImmutableMap.of();
+    if (accountInfo.email().isPresent()) {
+      possibleReplacements =
+          changeFixProgress.parsedAccounts.entrySet().stream()
+              .filter(
+                  e ->
+                      e.getValue().isPresent()
+                          && Objects.equals(
+                              e.getValue().get().account().preferredEmail(),
+                              accountInfo.email().get()))
+              .collect(ImmutableMap.toImmutableMap(Map.Entry::getKey, e -> e.getValue().get()));
+      // Filter further so we match both email & name
+      if (possibleReplacements.size() > 1) {
+        logger.atWarning().log(
+            "Fixing ref %s, multiple accounts found with the same email address, while replacing %s",
+            changeFixProgress.changeMetaRef, accountInfo);
+        possibleReplacements =
+            possibleReplacements.entrySet().stream()
+                .filter(e -> Objects.equals(e.getValue().account().getName(), accountInfo.name()))
+                .collect(ImmutableMap.toImmutableMap(Map.Entry::getKey, Map.Entry::getValue));
+      }
+    }
+    if (possibleReplacements.isEmpty()) {
+      possibleReplacements =
+          changeFixProgress.parsedAccounts.entrySet().stream()
+              .filter(
+                  e ->
+                      e.getValue().isPresent()
+                          && Objects.equals(
+                              e.getValue().get().account().getName(), accountInfo.name()))
+              .collect(ImmutableMap.toImmutableMap(Map.Entry::getKey, e -> e.getValue().get()));
+    }
     String replacementName = DEFAULT_ACCOUNT_REPLACEMENT;
     if (possibleReplacements.isEmpty()) {
-      logger.atWarning().log("Could not find reviewer account matching name %s", accountName);
+      logger.atWarning().log(
+          "Fixing ref %s, could not find reviewer account matching name %s",
+          changeFixProgress.changeMetaRef, accountInfo);
     } else if (possibleReplacements.size() > 1) {
-      logger.atWarning().log("Found multiple reviewer account matching name %s", accountName);
+      logger.atWarning().log(
+          "Fixing ref %s found multiple reviewer account matching name %s",
+          changeFixProgress.changeMetaRef, accountInfo);
     } else {
       replacementName =
-          AccountTemplateUtil.getAccountTemplate(Iterables.getOnlyElement(possibleReplacements));
+          AccountTemplateUtil.getAccountTemplate(
+              Iterables.getOnlyElement(possibleReplacements.keySet()));
     }
     return replacementName;
   }
@@ -1135,6 +1206,13 @@
    * recent update.
    */
   private static class ChangeFixProgress {
+
+    /** {@link RefNames#changeMetaRef} of the change that is being fixed. */
+    final String changeMetaRef;
+
+    /** Tag at current commit update. */
+    String tag = null;
+
     /** Assignee at current commit update. */
     Account.Id assigneeId = null;
 
@@ -1146,7 +1224,7 @@
      * #accountCache} if needed by rewrite. Maps to empty string if was not requested from cache
      * yet.
      */
-    Map<Account.Id, String> parsedAccounts = new HashMap<>();
+    Map<Account.Id, Optional<AccountState>> parsedAccounts = new HashMap<>();
 
     /** Id of the current commit in rewriter walk. */
     ObjectId newTipId = null;
@@ -1160,5 +1238,29 @@
     boolean isValidAfterFix = true;
 
     List<CommitDiff> commitDiffs = new ArrayList<>();
+
+    public ChangeFixProgress(String changeMetaRef) {
+      this.changeMetaRef = changeMetaRef;
+    }
+  }
+
+  /**
+   * Account info parsed from {@link Account#getNameEmail}. See {@link
+   * #getAccountInfoFromNameEmail}.
+   */
+  @AutoValue
+  abstract static class ParsedAccountInfo {
+
+    static ParsedAccountInfo create(String fullName, String email) {
+      return new AutoValue_CommitRewriter_ParsedAccountInfo(fullName, Optional.ofNullable(email));
+    }
+
+    static ParsedAccountInfo create(String fullName) {
+      return new AutoValue_CommitRewriter_ParsedAccountInfo(fullName, Optional.empty());
+    }
+
+    abstract String name();
+
+    abstract Optional<String> email();
   }
 }
diff --git a/java/com/google/gerrit/server/query/change/ChangeData.java b/java/com/google/gerrit/server/query/change/ChangeData.java
index 6c74301..c551cd2 100644
--- a/java/com/google/gerrit/server/query/change/ChangeData.java
+++ b/java/com/google/gerrit/server/query/change/ChangeData.java
@@ -1347,14 +1347,7 @@
       draftsByUser = new HashMap<>();
       for (Ref ref : commentsUtil.getDraftRefs(notes().getChangeId())) {
         Account.Id account = Account.Id.fromRefSuffix(ref.getName());
-        if (account != null
-            // Double-check that any drafts exist for this user after
-            // filtering out zombies. If some but not all drafts in the ref
-            // were zombies, the returned Ref still includes those zombies;
-            // this is suboptimal, but is ok for the purposes of
-            // draftsByUser(), and easier than trying to rebuild the change at
-            // this point.
-            && !notes().getDraftComments(account, ref).isEmpty()) {
+        if (account != null) {
           draftsByUser.put(account, ref.getObjectId());
         }
       }
diff --git a/java/com/google/gerrit/server/restapi/change/PostReview.java b/java/com/google/gerrit/server/restapi/change/PostReview.java
index 5002a82..5c252f4 100644
--- a/java/com/google/gerrit/server/restapi/change/PostReview.java
+++ b/java/com/google/gerrit/server/restapi/change/PostReview.java
@@ -92,7 +92,9 @@
 import com.google.gerrit.server.PatchSetUtil;
 import com.google.gerrit.server.PublishCommentUtil;
 import com.google.gerrit.server.ReviewerSet;
+import com.google.gerrit.server.account.AccountCache;
 import com.google.gerrit.server.account.AccountResolver;
+import com.google.gerrit.server.account.AccountState;
 import com.google.gerrit.server.approval.ApprovalsUtil;
 import com.google.gerrit.server.change.ChangeResource;
 import com.google.gerrit.server.change.EmailReviewComments;
@@ -105,6 +107,7 @@
 import com.google.gerrit.server.change.WorkInProgressOp;
 import com.google.gerrit.server.config.GerritServerConfig;
 import com.google.gerrit.server.extensions.events.CommentAdded;
+import com.google.gerrit.server.extensions.events.ReviewerAdded;
 import com.google.gerrit.server.logging.Metadata;
 import com.google.gerrit.server.logging.TraceContext;
 import com.google.gerrit.server.notedb.ChangeNotes;
@@ -187,6 +190,7 @@
   private final BatchUpdate.Factory updateFactory;
   private final ChangeResource.Factory changeResourceFactory;
   private final ChangeData.Factory changeDataFactory;
+  private final AccountCache accountCache;
   private final ApprovalsUtil approvalsUtil;
   private final ChangeMessagesUtil cmUtil;
   private final CommentsUtil commentsUtil;
@@ -206,6 +210,7 @@
   private final PluginSetContext<CommentValidator> commentValidators;
   private final PluginSetContext<OnPostReview> onPostReviews;
   private final ReplyAttentionSetUpdates replyAttentionSetUpdates;
+  private final ReviewerAdded reviewerAdded;
   private final boolean strictLabels;
   private final boolean publishPatchSetLevelComment;
 
@@ -214,6 +219,7 @@
       BatchUpdate.Factory updateFactory,
       ChangeResource.Factory changeResourceFactory,
       ChangeData.Factory changeDataFactory,
+      AccountCache accountCache,
       ApprovalsUtil approvalsUtil,
       ChangeMessagesUtil cmUtil,
       CommentsUtil commentsUtil,
@@ -233,10 +239,12 @@
       PermissionBackend permissionBackend,
       PluginSetContext<CommentValidator> commentValidators,
       PluginSetContext<OnPostReview> onPostReviews,
-      ReplyAttentionSetUpdates replyAttentionSetUpdates) {
+      ReplyAttentionSetUpdates replyAttentionSetUpdates,
+      ReviewerAdded reviewerAdded) {
     this.updateFactory = updateFactory;
     this.changeResourceFactory = changeResourceFactory;
     this.changeDataFactory = changeDataFactory;
+    this.accountCache = accountCache;
     this.commentsUtil = commentsUtil;
     this.publishCommentUtil = publishCommentUtil;
     this.psUtil = psUtil;
@@ -256,6 +264,7 @@
     this.commentValidators = commentValidators;
     this.onPostReviews = onPostReviews;
     this.replyAttentionSetUpdates = replyAttentionSetUpdates;
+    this.reviewerAdded = reviewerAdded;
     this.strictLabels = gerritConfig.getBoolean("change", "strictLabels", false);
     this.publishPatchSetLevelComment =
         gerritConfig.getBoolean("event", "comment-added", "publishPatchSetLevelComment", true);
@@ -371,6 +380,7 @@
       logger.atFine().log("adding reviewer additions");
       for (ReviewerModification reviewerResult : reviewerResults) {
         reviewerResult.op.suppressEmail(); // Send a single batch email below.
+        reviewerResult.op.suppressEvent(); // Send events below, if possible as batch.
         bu.addOp(revision.getChange().getId(), reviewerResult.op);
         if (!ccOrReviewer && reviewerResult.reviewers.contains(account)) {
           logger.atFine().log("calling user is explicitly added as reviewer or CC");
@@ -386,6 +396,7 @@
         ReviewerModification selfAddition =
             reviewerModifier.ccCurrentUser(revision.getUser(), revision);
         selfAddition.op.suppressEmail();
+        selfAddition.op.suppressEvent();
         bu.addOp(revision.getChange().getId(), selfAddition.op);
       }
 
@@ -433,8 +444,10 @@
         reviewerResult.gatherResults(cd);
       }
 
-      // Sending from AddReviewersOp was suppressed so we can send a single batch email here.
+      // Sending emails and events from ReviewersOps was suppressed so we can send a single batch
+      // email/event here.
       batchEmailReviewers(revision.getUser(), revision.getChange(), reviewerResults, notify);
+      batchReviewerEvents(revision.getUser(), cd, revision.getPatchSet(), reviewerResults, ts);
     }
 
     return Response.ok(output);
@@ -512,6 +525,35 @@
     }
   }
 
+  private void batchReviewerEvents(
+      CurrentUser user,
+      ChangeData cd,
+      PatchSet patchSet,
+      List<ReviewerModification> reviewerModifications,
+      Timestamp when) {
+    List<AccountState> newlyAddedReviewers = new ArrayList<>();
+
+    // There are no events for CCs and reviewers added/deleted by email.
+    for (ReviewerModification modification : reviewerModifications) {
+      Result reviewerAdditionResult = modification.op.getResult();
+      if (modification.state() == ReviewerState.REVIEWER) {
+        newlyAddedReviewers.addAll(
+            reviewerAdditionResult.addedReviewers().stream()
+                .map(psa -> psa.accountId())
+                .map(accountId -> accountCache.get(accountId))
+                .flatMap(Streams::stream)
+                .collect(toList()));
+      } else if (modification.state() == ReviewerState.REMOVED) {
+        // There is no batch event for reviewer removals, hence fire the event for each
+        // modification that deleted a reviewer immediately.
+        modification.op.sendEvent();
+      }
+    }
+
+    // Fire a batch event for all newly added reviewers.
+    reviewerAdded.fire(cd, patchSet, newlyAddedReviewers, user.asIdentifiedUser().state(), when);
+  }
+
   private RevisionResource onBehalfOf(RevisionResource rev, LabelTypes labelTypes, ReviewInput in)
       throws BadRequestException, AuthException, UnprocessableEntityException,
           PermissionBackendException, IOException, ConfigInvalidException {
diff --git a/java/com/google/gerrit/server/restapi/project/ListProjects.java b/java/com/google/gerrit/server/restapi/project/ListProjects.java
index 3ef9c8f..4d8005b 100644
--- a/java/com/google/gerrit/server/restapi/project/ListProjects.java
+++ b/java/com/google/gerrit/server/restapi/project/ListProjects.java
@@ -578,18 +578,12 @@
     }
   }
 
-  private List<Ref> retrieveBranchRefs(ProjectState e, Repository git)
-      throws PermissionBackendException {
-    boolean canReadAllRefs = e.statePermitsRead();
-    if (canReadAllRefs) {
-      try {
-        permissionBackend.user(currentUser).project(e.getNameKey()).check(ProjectPermission.READ);
-      } catch (AuthException exp) {
-        canReadAllRefs = false;
-      }
+  private List<Ref> retrieveBranchRefs(ProjectState e, Repository git) {
+    if (!e.statePermitsRead()) {
+      return ImmutableList.of();
     }
 
-    return getBranchRefs(e.getNameKey(), canReadAllRefs, git);
+    return getBranchRefs(e.getNameKey(), git);
   }
 
   private void addParentProjectInfo(
@@ -709,16 +703,13 @@
     stdout.flush();
   }
 
-  private List<Ref> getBranchRefs(
-      Project.NameKey projectName, boolean canReadAllRefs, Repository git) {
+  private List<Ref> getBranchRefs(Project.NameKey projectName, Repository git) {
     Ref[] result = new Ref[showBranch.size()];
     try {
       PermissionBackend.ForProject perm = permissionBackend.user(currentUser).project(projectName);
       for (int i = 0; i < showBranch.size(); i++) {
         Ref ref = git.findRef(showBranch.get(i));
-        if (all && canReadAllRefs) {
-          result[i] = ref;
-        } else if (ref != null && ref.getObjectId() != null) {
+        if (ref != null && ref.getObjectId() != null) {
           try {
             perm.ref(ref.getLeaf().getName()).check(RefPermission.READ);
             result[i] = ref;
diff --git a/javatests/com/google/gerrit/acceptance/api/change/ChangeIT.java b/javatests/com/google/gerrit/acceptance/api/change/ChangeIT.java
index 6166f36..59011f6 100644
--- a/javatests/com/google/gerrit/acceptance/api/change/ChangeIT.java
+++ b/javatests/com/google/gerrit/acceptance/api/change/ChangeIT.java
@@ -99,10 +99,12 @@
 import com.google.gerrit.entities.LabelFunction;
 import com.google.gerrit.entities.LabelId;
 import com.google.gerrit.entities.LabelType;
+import com.google.gerrit.entities.LegacySubmitRequirement;
 import com.google.gerrit.entities.PatchSet;
 import com.google.gerrit.entities.Permission;
 import com.google.gerrit.entities.Project;
 import com.google.gerrit.entities.RefNames;
+import com.google.gerrit.entities.SubmitRecord;
 import com.google.gerrit.entities.SubmitRequirement;
 import com.google.gerrit.entities.SubmitRequirementExpression;
 import com.google.gerrit.entities.SubmitRequirementExpressionResult;
@@ -148,7 +150,9 @@
 import com.google.gerrit.extensions.common.CommitInfo;
 import com.google.gerrit.extensions.common.GitPerson;
 import com.google.gerrit.extensions.common.LabelInfo;
+import com.google.gerrit.extensions.common.LegacySubmitRequirementInfo;
 import com.google.gerrit.extensions.common.RevisionInfo;
+import com.google.gerrit.extensions.common.SubmitRecordInfo;
 import com.google.gerrit.extensions.common.SubmitRequirementResultInfo;
 import com.google.gerrit.extensions.common.SubmitRequirementResultInfo.Status;
 import com.google.gerrit.extensions.common.TrackingIdInfo;
@@ -186,6 +190,7 @@
 import com.google.gerrit.server.query.change.ChangeData;
 import com.google.gerrit.server.query.change.ChangeQueryBuilder.ChangeOperatorFactory;
 import com.google.gerrit.server.restapi.change.PostReview;
+import com.google.gerrit.server.rules.SubmitRule;
 import com.google.gerrit.server.update.BatchUpdate;
 import com.google.gerrit.server.update.BatchUpdateOp;
 import com.google.gerrit.server.update.ChangeContext;
@@ -4033,6 +4038,51 @@
   }
 
   @Test
+  public void submitRecords() throws Exception {
+    PushOneCommit.Result r = createChange();
+    TestSubmitRule testSubmitRule = new TestSubmitRule();
+    try (Registration registration = extensionRegistry.newRegistration().add(testSubmitRule)) {
+      String changeId = r.getChangeId();
+
+      ChangeInfo change = gApi.changes().id(changeId).get();
+      assertThat(change.submitRecords).hasSize(2);
+      // Check the default submit record for the code-review label
+      SubmitRecordInfo codeReviewRecord = Iterables.get(change.submitRecords, 0);
+      assertThat(codeReviewRecord.ruleName).isEqualTo("gerrit~DefaultSubmitRule");
+      assertThat(codeReviewRecord.status).isEqualTo(SubmitRecordInfo.Status.NOT_READY);
+      assertThat(codeReviewRecord.labels).hasSize(1);
+      SubmitRecordInfo.Label label = Iterables.getOnlyElement(codeReviewRecord.labels);
+      assertThat(label.label).isEqualTo("Code-Review");
+      assertThat(label.status).isEqualTo(SubmitRecordInfo.Label.Status.NEED);
+      assertThat(label.appliedBy).isNull();
+      // Check the custom test record created by the TestSubmitRule
+      SubmitRecordInfo testRecord = Iterables.get(change.submitRecords, 1);
+      assertThat(testRecord.ruleName).isEqualTo("gerrit~TestSubmitRule");
+      assertThat(testRecord.status).isEqualTo(SubmitRecordInfo.Status.OK);
+      assertThat(testRecord.requirements)
+          .containsExactly(new LegacySubmitRequirementInfo("OK", "fallback text", "type"));
+      assertThat(testRecord.labels).hasSize(1);
+      SubmitRecordInfo.Label testLabel = Iterables.getOnlyElement(testRecord.labels);
+      assertThat(testLabel.label).isEqualTo("label");
+      assertThat(testLabel.status).isEqualTo(SubmitRecordInfo.Label.Status.OK);
+      assertThat(testLabel.appliedBy).isNull();
+
+      voteLabel(changeId, "code-review", 2);
+      // Code review record is satisfied after voting +2
+      change = gApi.changes().id(changeId).get();
+      assertThat(change.submitRecords).hasSize(2);
+      codeReviewRecord = Iterables.get(change.submitRecords, 0);
+      assertThat(codeReviewRecord.ruleName).isEqualTo("gerrit~DefaultSubmitRule");
+      assertThat(codeReviewRecord.status).isEqualTo(SubmitRecordInfo.Status.OK);
+      assertThat(codeReviewRecord.labels).hasSize(1);
+      label = Iterables.getOnlyElement(codeReviewRecord.labels);
+      assertThat(label.label).isEqualTo("Code-Review");
+      assertThat(label.status).isEqualTo(SubmitRecordInfo.Label.Status.OK);
+      assertThat(label.appliedBy._accountId).isEqualTo(admin.id().get());
+    }
+  }
+
+  @Test
   public void submitRequirement_withLabelEqualsMax() throws Exception {
     configSubmitRequirement(
         project,
@@ -5183,4 +5233,25 @@
         .update();
     return project;
   }
+
+  /** Returns a hard-coded submit record containing all fields. */
+  private static class TestSubmitRule implements SubmitRule {
+    @Override
+    public Optional<SubmitRecord> evaluate(ChangeData changeData) {
+      SubmitRecord record = new SubmitRecord();
+      record.ruleName = "testSubmitRule";
+      record.status = SubmitRecord.Status.OK;
+      SubmitRecord.Label label = new SubmitRecord.Label();
+      label.label = "label";
+      label.status = SubmitRecord.Label.Status.OK;
+      record.labels = Arrays.asList(label);
+      record.requirements =
+          Arrays.asList(
+              LegacySubmitRequirement.builder()
+                  .setType("type")
+                  .setFallbackText("fallback text")
+                  .build());
+      return Optional.of(record);
+    }
+  }
 }
diff --git a/javatests/com/google/gerrit/acceptance/api/change/PostReviewIT.java b/javatests/com/google/gerrit/acceptance/api/change/PostReviewIT.java
index b79be80..96bc65d 100644
--- a/javatests/com/google/gerrit/acceptance/api/change/PostReviewIT.java
+++ b/javatests/com/google/gerrit/acceptance/api/change/PostReviewIT.java
@@ -27,6 +27,7 @@
 
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.ImmutableSet;
 import com.google.common.collect.Iterables;
 import com.google.common.truth.Correspondence;
 import com.google.gerrit.acceptance.AbstractDaemonTest;
@@ -56,6 +57,8 @@
 import com.google.gerrit.extensions.common.RobotCommentInfo;
 import com.google.gerrit.extensions.config.FactoryModule;
 import com.google.gerrit.extensions.events.CommentAddedListener;
+import com.google.gerrit.extensions.events.ReviewerAddedListener;
+import com.google.gerrit.extensions.events.ReviewerDeletedListener;
 import com.google.gerrit.extensions.restapi.BadRequestException;
 import com.google.gerrit.extensions.restapi.ResourceNotFoundException;
 import com.google.gerrit.extensions.restapi.RestApiException;
@@ -74,6 +77,7 @@
 import com.google.inject.Inject;
 import com.google.inject.Module;
 import java.sql.Timestamp;
+import java.util.ArrayList;
 import java.util.Collection;
 import java.util.List;
 import java.util.Map;
@@ -699,6 +703,61 @@
   }
 
   @Test
+  public void addingReviewers() throws Exception {
+    PushOneCommit.Result r = createChange();
+
+    TestAccount user2 = accountCreator.user2();
+
+    TestReviewerAddedListener testReviewerAddedListener = new TestReviewerAddedListener();
+    try (Registration registration =
+        extensionRegistry.newRegistration().add(testReviewerAddedListener)) {
+      // add user and user2
+      ReviewResult reviewResult =
+          gApi.changes()
+              .id(r.getChangeId())
+              .current()
+              .review(ReviewInput.create().reviewer(user.email()).reviewer(user2.email()));
+
+      assertThat(
+              reviewResult.reviewers.values().stream()
+                  .filter(a -> a.reviewers != null)
+                  .map(a -> Iterables.getOnlyElement(a.reviewers).name)
+                  .collect(toImmutableSet()))
+          .containsExactly(user.fullName(), user2.fullName());
+    }
+
+    assertThat(
+            gApi.changes().id(r.getChangeId()).reviewers().stream()
+                .map(a -> a.name)
+                .collect(toImmutableSet()))
+        .containsExactly(user.fullName(), user2.fullName());
+
+    // Ensure only one batch email was sent for this operation
+    FakeEmailSender.Message message = Iterables.getOnlyElement(sender.getMessages());
+    assertThat(message.body())
+        .containsMatch(
+            Pattern.quote("Hello ")
+                + "("
+                + Pattern.quote(String.format("%s, %s", user.fullName(), user2.fullName()))
+                + "|"
+                + Pattern.quote(String.format("%s, %s", user2.fullName(), user.fullName()))
+                + ")");
+    assertThat(message.htmlBody())
+        .containsMatch(
+            "("
+                + Pattern.quote(String.format("%s and %s", user.fullName(), user2.fullName()))
+                + "|"
+                + Pattern.quote(String.format("%s and %s", user2.fullName(), user.fullName()))
+                + ")"
+                + Pattern.quote(" to <strong>review</strong> this change"));
+
+    // Ensure that a batch event has been sent:
+    // * 1 batch event for adding user and user2 as reviewers
+    assertThat(testReviewerAddedListener.receivedEvents).hasSize(1);
+    assertThat(testReviewerAddedListener.getReviewerIds()).containsExactly(user.id(), user2.id());
+  }
+
+  @Test
   public void deletingReviewers() throws Exception {
     PushOneCommit.Result r = createChange();
 
@@ -712,21 +771,25 @@
 
     sender.clear();
 
-    // remove user and user2
-    ReviewResult reviewResult =
-        gApi.changes()
-            .id(r.getChangeId())
-            .current()
-            .review(
-                ReviewInput.create()
-                    .reviewer(user.email(), ReviewerState.REMOVED, /* confirmed= */ true)
-                    .reviewer(user2.email(), ReviewerState.REMOVED, /* confirmed= */ true));
+    TestReviewerDeletedListener testReviewerDeletedListener = new TestReviewerDeletedListener();
+    try (Registration registration =
+        extensionRegistry.newRegistration().add(testReviewerDeletedListener)) {
+      // remove user and user2
+      ReviewResult reviewResult =
+          gApi.changes()
+              .id(r.getChangeId())
+              .current()
+              .review(
+                  ReviewInput.create()
+                      .reviewer(user.email(), ReviewerState.REMOVED, /* confirmed= */ true)
+                      .reviewer(user2.email(), ReviewerState.REMOVED, /* confirmed= */ true));
 
-    assertThat(
-            reviewResult.reviewers.values().stream()
-                .map(a -> a.removed.name)
-                .collect(toImmutableSet()))
-        .containsExactly(user.fullName(), user2.fullName());
+      assertThat(
+              reviewResult.reviewers.values().stream()
+                  .map(a -> a.removed.name)
+                  .collect(toImmutableSet()))
+          .containsExactly(user.fullName(), user2.fullName());
+    }
 
     assertThat(gApi.changes().id(r.getChangeId()).reviewers()).isEmpty();
 
@@ -748,6 +811,12 @@
                 + "|"
                 + Pattern.quote(String.format("%s and %s", user2.fullName(), user.fullName()))
                 + ")");
+
+    // Ensure that events have been sent:
+    // * 2 events for removing user and user2 as reviewers (one event per removed reviewer, batch
+    //   event not available for reviewer removal)
+    assertThat(testReviewerDeletedListener.receivedEvents).hasSize(2);
+    assertThat(testReviewerDeletedListener.getReviewerIds()).containsExactly(user.id(), user2.id());
   }
 
   @Test
@@ -766,30 +835,38 @@
 
     sender.clear();
 
-    // remove user and user2 while adding user3 and user4
-    ReviewResult reviewResult =
-        gApi.changes()
-            .id(r.getChangeId())
-            .current()
-            .review(
-                ReviewInput.create()
-                    .reviewer(user.email(), ReviewerState.REMOVED, /* confirmed= */ true)
-                    .reviewer(user2.email(), ReviewerState.REMOVED, /* confirmed= */ true)
-                    .reviewer(user3.email())
-                    .reviewer(user4.email()));
+    TestReviewerAddedListener testReviewerAddedListener = new TestReviewerAddedListener();
+    TestReviewerDeletedListener testReviewerDeletedListener = new TestReviewerDeletedListener();
+    try (Registration registration =
+        extensionRegistry
+            .newRegistration()
+            .add(testReviewerAddedListener)
+            .add(testReviewerDeletedListener)) {
+      // remove user and user2 while adding user3 and user4
+      ReviewResult reviewResult =
+          gApi.changes()
+              .id(r.getChangeId())
+              .current()
+              .review(
+                  ReviewInput.create()
+                      .reviewer(user.email(), ReviewerState.REMOVED, /* confirmed= */ true)
+                      .reviewer(user2.email(), ReviewerState.REMOVED, /* confirmed= */ true)
+                      .reviewer(user3.email())
+                      .reviewer(user4.email()));
 
-    assertThat(
-            reviewResult.reviewers.values().stream()
-                .filter(a -> a.removed != null)
-                .map(a -> a.removed.name)
-                .collect(toImmutableSet()))
-        .containsExactly(user.fullName(), user2.fullName());
-    assertThat(
-            reviewResult.reviewers.values().stream()
-                .filter(a -> a.reviewers != null)
-                .map(a -> Iterables.getOnlyElement(a.reviewers).name)
-                .collect(toImmutableSet()))
-        .containsExactly(user3.fullName(), user4.fullName());
+      assertThat(
+              reviewResult.reviewers.values().stream()
+                  .filter(a -> a.removed != null)
+                  .map(a -> a.removed.name)
+                  .collect(toImmutableSet()))
+          .containsExactly(user.fullName(), user2.fullName());
+      assertThat(
+              reviewResult.reviewers.values().stream()
+                  .filter(a -> a.reviewers != null)
+                  .map(a -> Iterables.getOnlyElement(a.reviewers).name)
+                  .collect(toImmutableSet()))
+          .containsExactly(user3.fullName(), user4.fullName());
+    }
 
     assertThat(
             gApi.changes().id(r.getChangeId()).reviewers().stream()
@@ -832,6 +909,15 @@
                 + "|"
                 + Pattern.quote(String.format("%s and %s", user2.fullName(), user.fullName()))
                 + ")");
+
+    // Ensure that events have been sent:
+    // * 1 batch event for adding user3 and user4 as reviewers
+    // * 2 events for removing user and user2 as reviewers (one event per removed reviewer, batch
+    //   event not available for reviewer removal)
+    assertThat(testReviewerAddedListener.receivedEvents).hasSize(1);
+    assertThat(testReviewerAddedListener.getReviewerIds()).containsExactly(user3.id(), user4.id());
+    assertThat(testReviewerDeletedListener.receivedEvents).hasSize(2);
+    assertThat(testReviewerDeletedListener.getReviewerIds()).containsExactly(user.id(), user2.id());
   }
 
   @Test
@@ -964,4 +1050,36 @@
       return Optional.empty();
     }
   }
+
+  private static class TestReviewerAddedListener implements ReviewerAddedListener {
+    List<ReviewerAddedListener.Event> receivedEvents = new ArrayList<>();
+
+    @Override
+    public void onReviewersAdded(ReviewerAddedListener.Event event) {
+      receivedEvents.add(event);
+    }
+
+    public ImmutableSet<Account.Id> getReviewerIds() {
+      return receivedEvents.stream()
+          .flatMap(e -> e.getReviewers().stream())
+          .map(accountInfo -> Account.id(accountInfo._accountId))
+          .collect(toImmutableSet());
+    }
+  }
+
+  private static class TestReviewerDeletedListener implements ReviewerDeletedListener {
+    List<ReviewerDeletedListener.Event> receivedEvents = new ArrayList<>();
+
+    @Override
+    public void onReviewerDeleted(ReviewerDeletedListener.Event event) {
+      receivedEvents.add(event);
+    }
+
+    public ImmutableSet<Account.Id> getReviewerIds() {
+      return receivedEvents.stream()
+          .map(ReviewerDeletedListener.Event::getReviewer)
+          .map(accountInfo -> Account.id(accountInfo._accountId))
+          .collect(toImmutableSet());
+    }
+  }
 }
diff --git a/javatests/com/google/gerrit/server/notedb/ChangeNotesTest.java b/javatests/com/google/gerrit/server/notedb/ChangeNotesTest.java
index c524c94..4e7b3f3 100644
--- a/javatests/com/google/gerrit/server/notedb/ChangeNotesTest.java
+++ b/javatests/com/google/gerrit/server/notedb/ChangeNotesTest.java
@@ -76,8 +76,6 @@
 import org.junit.Test;
 
 public class ChangeNotesTest extends AbstractChangeNotesTest {
-  @Inject private DraftCommentNotes.Factory draftNotesFactory;
-
   @Inject private ChangeNoteJson changeNoteJson;
 
   @Test
@@ -2980,86 +2978,6 @@
   }
 
   @Test
-  public void filterOutAndFixUpZombieDraftComments() throws Exception {
-    Change c = newChange();
-    ObjectId commitId1 = ObjectId.fromString("abcd1234abcd1234abcd1234abcd1234abcd1234");
-    CommentRange range = new CommentRange(1, 1, 2, 1);
-    PatchSet.Id ps1 = c.currentPatchSetId();
-    short side = (short) 1;
-
-    ChangeUpdate update = newUpdate(c, otherUser);
-    Timestamp now = TimeUtil.nowTs();
-    HumanComment comment1 =
-        newComment(
-            ps1,
-            "file1",
-            "uuid1",
-            range,
-            range.getEndLine(),
-            otherUser,
-            null,
-            now,
-            "comment on ps1",
-            side,
-            commitId1,
-            false);
-    HumanComment comment2 =
-        newComment(
-            ps1,
-            "file2",
-            "uuid2",
-            range,
-            range.getEndLine(),
-            otherUser,
-            null,
-            now,
-            "another comment",
-            side,
-            commitId1,
-            false);
-    update.putComment(HumanComment.Status.DRAFT, comment1);
-    update.putComment(HumanComment.Status.DRAFT, comment2);
-    update.commit();
-
-    String refName = refsDraftComments(c.getId(), otherUserId);
-    ObjectId oldDraftId = exactRefAllUsers(refName);
-
-    update = newUpdate(c, otherUser);
-    update.setPatchSetId(ps1);
-    update.putComment(HumanComment.Status.PUBLISHED, comment2);
-    update.commit();
-    assertThat(exactRefAllUsers(refName)).isNotNull();
-    assertThat(exactRefAllUsers(refName)).isNotEqualTo(oldDraftId);
-
-    // Re-add draft version of comment2 back to draft ref without updating
-    // change ref. Simulates the case where deleting the draft failed
-    // non-atomically after adding the published comment succeeded.
-    ChangeDraftUpdate draftUpdate = newUpdate(c, otherUser).createDraftUpdateIfNull();
-    draftUpdate.putComment(comment2);
-    try (NoteDbUpdateManager manager = updateManagerFactory.create(c.getProject())) {
-      manager.add(draftUpdate);
-      manager.execute();
-    }
-
-    // Looking at drafts directly shows the zombie comment.
-    DraftCommentNotes draftNotes = draftNotesFactory.create(c.getId(), otherUserId);
-    assertThat(draftNotes.load().getComments().get(commitId1)).containsExactly(comment1, comment2);
-
-    // Zombie comment is filtered out of drafts via ChangeNotes.
-    ChangeNotes notes = newNotes(c);
-    assertThat(notes.getDraftComments(otherUserId).get(commitId1)).containsExactly(comment1);
-    assertThat(notes.getHumanComments().get(commitId1)).containsExactly(comment2);
-
-    update = newUpdate(c, otherUser);
-    update.setPatchSetId(ps1);
-    update.putComment(HumanComment.Status.PUBLISHED, comment1);
-    update.commit();
-
-    // Updating an unrelated comment causes the zombie comment to get fixed up.
-    assertThat(exactRefAllUsers(refName)).isNull();
-  }
-
-  @Test
   public void updateCommentsInSequentialUpdates() throws Exception {
     Change c = newChange();
     CommentRange range = new CommentRange(1, 1, 2, 1);
diff --git a/javatests/com/google/gerrit/server/notedb/CommitRewriterTest.java b/javatests/com/google/gerrit/server/notedb/CommitRewriterTest.java
index 26e1881..19c2bcf 100644
--- a/javatests/com/google/gerrit/server/notedb/CommitRewriterTest.java
+++ b/javatests/com/google/gerrit/server/notedb/CommitRewriterTest.java
@@ -34,6 +34,7 @@
 import com.google.gerrit.entities.RefNames;
 import com.google.gerrit.entities.SubmitRecord;
 import com.google.gerrit.json.OutputFormat;
+import com.google.gerrit.server.CurrentUser;
 import com.google.gerrit.server.IdentifiedUser;
 import com.google.gerrit.server.ReviewerStatusUpdate;
 import com.google.gerrit.server.notedb.ChangeNoteUtil.AttentionStatusInNoteDb;
@@ -837,6 +838,118 @@
   }
 
   @Test
+  public void fixRemoveVoteChangeMessageWithNoFooterLabel_matchByEmail() throws Exception {
+    Change c = newChange();
+    ChangeUpdate approvalUpdate = newUpdate(c, changeOwner);
+    approvalUpdate.putApproval(VERIFIED, (short) +2);
+
+    approvalUpdate.putApprovalFor(otherUserId, VERIFIED, (short) -1);
+    approvalUpdate.commit();
+    writeUpdate(
+        RefNames.changeMetaRef(c.getId()),
+        getChangeUpdateBody(
+            c, /*changeMessage=*/ "Removed Verified+2 by Renamed Change Owner <change@owner.com>"),
+        getAuthorIdent(changeOwner.getAccount()));
+
+    RunOptions options = new RunOptions();
+    options.dryRun = false;
+    BackfillResult result = rewriter.backfillProject(project, repo, options);
+    assertThat(result.fixedRefDiff.keySet()).containsExactly(RefNames.changeMetaRef(c.getId()));
+
+    List<String> commitHistoryDiff = commitHistoryDiff(result, c.getId());
+    assertThat(commitHistoryDiff)
+        .containsExactly(
+            "@@ -6 +6 @@\n"
+                + "-Removed Verified+2 by Renamed Change Owner <change@owner.com>\n"
+                + "+Removed Verified+2 by <GERRIT_ACCOUNT_1>\n");
+    BackfillResult secondRunResult = rewriter.backfillProject(project, repo, options);
+    assertThat(secondRunResult.fixedRefDiff.keySet()).isEmpty();
+    assertThat(secondRunResult.refsFailedToFix).isEmpty();
+  }
+
+  @Test
+  public void fixRemoveVoteChangeMessageWithNoFooterLabel_matchByName() throws Exception {
+    Change c = newChange();
+    ChangeUpdate approvalUpdate = newUpdate(c, changeOwner);
+    approvalUpdate.putApproval(VERIFIED, (short) +2);
+
+    approvalUpdate.putApprovalFor(otherUserId, VERIFIED, (short) -1);
+    approvalUpdate.commit();
+    writeUpdate(
+        RefNames.changeMetaRef(c.getId()),
+        getChangeUpdateBody(c, /*changeMessage=*/ "Removed Verified+2 by Change Owner"),
+        getAuthorIdent(changeOwner.getAccount()));
+
+    RunOptions options = new RunOptions();
+    options.dryRun = false;
+    BackfillResult result = rewriter.backfillProject(project, repo, options);
+    assertThat(result.fixedRefDiff.keySet()).containsExactly(RefNames.changeMetaRef(c.getId()));
+
+    List<String> commitHistoryDiff = commitHistoryDiff(result, c.getId());
+    assertThat(commitHistoryDiff)
+        .containsExactly(
+            "@@ -6 +6 @@\n"
+                + "-Removed Verified+2 by Change Owner\n"
+                + "+Removed Verified+2 by <GERRIT_ACCOUNT_1>\n");
+    BackfillResult secondRunResult = rewriter.backfillProject(project, repo, options);
+    assertThat(secondRunResult.fixedRefDiff.keySet()).isEmpty();
+    assertThat(secondRunResult.refsFailedToFix).isEmpty();
+  }
+
+  @Test
+  public void fixRemoveVoteChangeMessageWithNoFooterLabel_matchDuplicateAccounts()
+      throws Exception {
+    Account duplicateCodeOwner =
+        Account.builder(Account.id(4), TimeUtil.nowTs())
+            .setFullName(changeOwner.getName())
+            .setPreferredEmail("other@test.com")
+            .build();
+    accountCache.put(duplicateCodeOwner);
+    Change c = newChange();
+    ChangeUpdate approvalUpdate = newUpdate(c, changeOwner);
+    approvalUpdate.putApproval(VERIFIED, (short) +2);
+
+    approvalUpdate.putApprovalFor(duplicateCodeOwner.id(), VERIFIED, (short) -1);
+    approvalUpdate.commit();
+    writeUpdate(
+        RefNames.changeMetaRef(c.getId()),
+        getChangeUpdateBody(
+            c, /*changeMessage=*/ "Removed Verified+2 by Change Owner <other@test.com>"),
+        getAuthorIdent(changeOwner.getAccount()));
+    writeUpdate(
+        RefNames.changeMetaRef(c.getId()),
+        getChangeUpdateBody(
+            c, /*changeMessage=*/ "Removed Verified+2 by Change Owner <change@owner.com>"),
+        getAuthorIdent(changeOwner.getAccount()));
+    writeUpdate(
+        RefNames.changeMetaRef(c.getId()),
+        getChangeUpdateBody(
+            c, /*changeMessage=*/ "Removed Verified-1 by Change Owner <other@test.com>"),
+        getAuthorIdent(changeOwner.getAccount()));
+
+    RunOptions options = new RunOptions();
+    options.dryRun = false;
+    BackfillResult result = rewriter.backfillProject(project, repo, options);
+    assertThat(result.fixedRefDiff.keySet()).containsExactly(RefNames.changeMetaRef(c.getId()));
+
+    List<String> commitHistoryDiff = commitHistoryDiff(result, c.getId());
+    assertThat(commitHistoryDiff)
+        .containsExactly(
+            "@@ -6 +6 @@\n"
+                + "-Removed Verified+2 by Change Owner <other@test.com>\n"
+                + "+Removed Verified+2 by <GERRIT_ACCOUNT_4>\n",
+            "@@ -6 +6 @@\n"
+                + "-Removed Verified+2 by Change Owner <change@owner.com>\n"
+                + "+Removed Verified+2 by <GERRIT_ACCOUNT_1>\n",
+            "@@ -6 +6 @@\n"
+                + "-Removed Verified-1 by Change Owner <other@test.com>\n"
+                + "+Removed Verified-1 by <GERRIT_ACCOUNT_4>\n");
+    BackfillResult secondRunResult = rewriter.backfillProject(project, repo, options);
+    assertThat(secondRunResult.fixedRefDiff.keySet()).isEmpty();
+    assertThat(secondRunResult.refsFailedToFix).isEmpty();
+  }
+
+  @Test
   public void fixRemoveVotesChangeMessage() throws Exception {
     Change c = newChange();
     ChangeUpdate approvalUpdate = newUpdate(c, changeOwner);
@@ -1491,19 +1604,20 @@
     accountCache.put(duplicateReviewer);
     Change c = newChange();
     ImmutableList.Builder<ObjectId> commitsToFix = new ImmutableList.Builder<>();
-    ChangeUpdate addReviewerUpdate = newUpdate(c, changeOwner);
+    ChangeUpdate addReviewerUpdate = newCodeOwnerAddReviewerUpdate(c, changeOwner);
     addReviewerUpdate.putReviewer(reviewer.id(), REVIEWER);
     addReviewerUpdate.commit();
-    ChangeUpdate invalidOnAddReviewerUpdate = newUpdate(c, changeOwner);
+    ChangeUpdate invalidOnAddReviewerUpdate = newCodeOwnerAddReviewerUpdate(c, changeOwner);
     invalidOnAddReviewerUpdate.setChangeMessage(
         "Reviewer User who was added as reviewer owns the following files:\n"
             + "   * file1.java\n"
             + "   * file2.ts\n");
     commitsToFix.add(invalidOnAddReviewerUpdate.commit());
-    ChangeUpdate addOtherReviewerUpdate = newUpdate(c, changeOwner);
+    ChangeUpdate addOtherReviewerUpdate = newCodeOwnerAddReviewerUpdate(c, changeOwner);
     addOtherReviewerUpdate.putReviewer(otherUserId, REVIEWER);
     addOtherReviewerUpdate.commit();
-    ChangeUpdate invalidOnAddReviewerMultipleReviewerUpdate = newUpdate(c, changeOwner);
+    ChangeUpdate invalidOnAddReviewerMultipleReviewerUpdate =
+        newCodeOwnerAddReviewerUpdate(c, changeOwner);
     invalidOnAddReviewerMultipleReviewerUpdate.setChangeMessage(
         "Reviewer User who was added as reviewer owns the following files:\n"
             + "   * file1.java\n"
@@ -1512,17 +1626,17 @@
             + "\nMissing Reviewer who was added as reviewer owns the following files:\n"
             + "   * file4.java\n");
     commitsToFix.add(invalidOnAddReviewerMultipleReviewerUpdate.commit());
-    ChangeUpdate addDuplicateReviewerUpdate = newUpdate(c, changeOwner);
+    ChangeUpdate addDuplicateReviewerUpdate = newCodeOwnerAddReviewerUpdate(c, changeOwner);
     addDuplicateReviewerUpdate.putReviewer(duplicateReviewer.id(), REVIEWER);
     addDuplicateReviewerUpdate.commit();
     // Reviewer name resolves to multiple accounts in the same change
-    ChangeUpdate onAddReviewerUpdateWithDuplicate = newUpdate(c, changeOwner);
+    ChangeUpdate onAddReviewerUpdateWithDuplicate = newCodeOwnerAddReviewerUpdate(c, changeOwner);
     onAddReviewerUpdateWithDuplicate.setChangeMessage(
         "Reviewer User who was added as reviewer owns the following files:\n"
             + "   * file6.java\n");
     commitsToFix.add(onAddReviewerUpdateWithDuplicate.commit());
 
-    ChangeUpdate validOnAddReviewerUpdate = newUpdate(c, changeOwner);
+    ChangeUpdate validOnAddReviewerUpdate = newCodeOwnerAddReviewerUpdate(c, changeOwner);
     validOnAddReviewerUpdate.setChangeMessage(
         "Gerrit Account who was added as reviewer owns the following files:\n"
             + "   * file1.java\n"
@@ -2137,6 +2251,13 @@
         .collect(toImmutableList());
   }
 
+  protected ChangeUpdate newCodeOwnerAddReviewerUpdate(Change c, CurrentUser user)
+      throws Exception {
+    ChangeUpdate update = newUpdate(c, user, true);
+    update.setTag("autogenerated:gerrit:code-owners:addReviewer");
+    return update;
+  }
+
   private ImmutableList<String> commitHistoryDiff(BackfillResult result, Change.Id changeId) {
     return result.fixedRefDiff.get(RefNames.changeMetaRef(changeId)).stream()
         .map(CommitDiff::diff)
diff --git a/javatests/com/google/gerrit/server/query/change/AbstractQueryChangesTest.java b/javatests/com/google/gerrit/server/query/change/AbstractQueryChangesTest.java
index 9ebee9c..2663853 100644
--- a/javatests/com/google/gerrit/server/query/change/AbstractQueryChangesTest.java
+++ b/javatests/com/google/gerrit/server/query/change/AbstractQueryChangesTest.java
@@ -69,7 +69,6 @@
 import com.google.gerrit.extensions.api.changes.DraftInput;
 import com.google.gerrit.extensions.api.changes.HashtagsInput;
 import com.google.gerrit.extensions.api.changes.ReviewInput;
-import com.google.gerrit.extensions.api.changes.ReviewInput.DraftHandling;
 import com.google.gerrit.extensions.api.changes.ReviewerInput;
 import com.google.gerrit.extensions.api.groups.GroupInput;
 import com.google.gerrit.extensions.api.projects.ConfigInput;
@@ -2334,44 +2333,6 @@
   }
 
   @Test
-  public void byHasDraftExcludesZombieDrafts() throws Exception {
-    Project.NameKey project = Project.nameKey("repo");
-    TestRepository<Repo> repo = createProject(project.get());
-    Change change = insert(repo, newChange(repo));
-    Change.Id id = change.getId();
-
-    DraftInput in = new DraftInput();
-    in.line = 1;
-    in.message = "nit: trailing whitespace";
-    in.path = Patch.COMMIT_MSG;
-    gApi.changes().id(id.get()).current().createDraft(in);
-
-    assertQuery("has:draft", change);
-    assertQuery("commentby:" + userId);
-
-    try (TestRepository<Repo> allUsers =
-        new TestRepository<>(repoManager.openRepository(allUsersName))) {
-      Ref draftsRef = allUsers.getRepository().exactRef(RefNames.refsDraftComments(id, userId));
-      assertThat(draftsRef).isNotNull();
-
-      ReviewInput rin = ReviewInput.dislike();
-      rin.drafts = DraftHandling.PUBLISH_ALL_REVISIONS;
-      gApi.changes().id(id.get()).current().review(rin);
-
-      assertQuery("has:draft");
-      assertQuery("commentby:" + userId, change);
-      assertThat(allUsers.getRepository().exactRef(draftsRef.getName())).isNull();
-
-      // Re-add drafts ref and ensure it gets filtered out during indexing.
-      allUsers.update(draftsRef.getName(), draftsRef.getObjectId());
-      assertThat(allUsers.getRepository().exactRef(draftsRef.getName())).isNotNull();
-    }
-
-    indexer.index(project, id);
-    assertQuery("has:draft");
-  }
-
-  @Test
   public void byStarredBy() throws Exception {
     TestRepository<Repo> repo = createProject("repo");
     Change change1 = insert(repo, newChange(repo));
diff --git a/package.json b/package.json
index a47ba9f..a492055 100644
--- a/package.json
+++ b/package.json
@@ -20,9 +20,11 @@
     "eslint-plugin-prettier": "^3.4.0",
     "eslint-plugin-regex": "^1.8.0",
     "gts": "^3.1.0",
+    "lit-analyzer": "^1.2.1",
     "prettier": "2.3.1",
     "rollup": "^2.45.2",
     "terser": "^5.6.1",
+    "ts-lit-plugin": "^1.2.1",
     "typescript": "4.3.2"
   },
   "scripts": {
@@ -34,6 +36,7 @@
     "safe_bazelisk": "if which bazelisk >/dev/null; then bazel_bin=bazelisk; else bazel_bin=bazel; fi && $bazel_bin",
     "eslint": "npm run safe_bazelisk test polygerrit-ui/app:lint_test",
     "eslintfix": "npm run safe_bazelisk run polygerrit-ui/app:lint_bin -- -- --fix $(pwd)/polygerrit-ui/app",
+    "litlint": "npm run safe_bazelisk run polygerrit-ui/app:lit_analysis",
     "test:debug": "npm run compile:local && npm run safe_bazelisk run //polygerrit-ui:karma_bin -- -- start $(pwd)/polygerrit-ui/karma.conf.js --root '.ts-out/polygerrit-ui/app/' --browsers ChromeDev --no-single-run --test-files",
     "test:single": "npm run compile:local && npm run safe_bazelisk run //polygerrit-ui:karma_bin -- -- start $(pwd)/polygerrit-ui/karma.conf.js --root '.ts-out/polygerrit-ui/app/' --test-files",
     "polylint": "npm run safe_bazelisk test //polygerrit-ui/app:polylint_test",
diff --git a/plugins/plugin-manager b/plugins/plugin-manager
index 5b87f63..ea992c3 160000
--- a/plugins/plugin-manager
+++ b/plugins/plugin-manager
@@ -1 +1 @@
-Subproject commit 5b87f63f3e9c5817bcddf008c0b4005494059368
+Subproject commit ea992c3b37eed5493c7031ee20faba9dd875170f
diff --git a/polygerrit-ui/app/BUILD b/polygerrit-ui/app/BUILD
index b3e29ba..3a647d4 100644
--- a/polygerrit-ui/app/BUILD
+++ b/polygerrit-ui/app/BUILD
@@ -94,7 +94,6 @@
 # so template tests pass.
 # TODO: fix problems reported by template checker in these files.
 ignore_templates_list = [
-    "elements/admin/gr-access-section/gr-access-section_html.ts",
     "elements/admin/gr-admin-view/gr-admin-view_html.ts",
     "elements/admin/gr-create-repo-dialog/gr-create-repo-dialog_html.ts",
     "elements/admin/gr-group-members/gr-group-members_html.ts",
@@ -130,12 +129,6 @@
     "elements/gr-app-element_html.ts",
     "elements/settings/gr-watched-projects-editor/gr-watched-projects-editor_html.ts",
     "elements/shared/gr-account-list/gr-account-list_html.ts",
-    "elements/shared/gr-comment-thread/gr-comment-thread_html.ts",
-    "elements/shared/gr-comment/gr-comment_html.ts",
-    "elements/shared/gr-dropdown-list/gr-dropdown-list_html.ts",
-    "elements/shared/gr-hovercard-account/gr-hovercard-account_html.ts",
-    "elements/shared/gr-label-info/gr-label-info_html.ts",
-    "elements/shared/gr-list-view/gr-list-view_html.ts",
 ]
 
 sources_for_template_checking = glob(
@@ -269,3 +262,32 @@
         "@npm//gts",
     ],
 )
+
+filegroup(
+    name = "lit_analysis_src_code",
+    srcs = glob(
+        ["**/*.ts"],
+        exclude = [
+            "**/*_html.ts",
+            "**/*_test.ts",
+        ],
+    ) + [
+        "@ui_dev_npm//:node_modules",
+        "@ui_npm//:node_modules",
+    ],
+)
+
+nodejs_binary(
+    name = "lit_analysis",
+    data = [
+        ":lit_analysis_src_code",
+        "@npm//lit-analyzer",
+    ],
+    entry_point = "@npm//:node_modules/lit-analyzer/cli.js",
+    templated_args = [
+        "**/elements/**/*.ts",
+        "--strict",
+        "--rules.no-property-visibility-mismatch off",
+        "--rules.no-incompatible-property-type off",
+    ],
+)
diff --git a/polygerrit-ui/app/api/popup.ts b/polygerrit-ui/app/api/popup.ts
index 8d81831..d265ee6 100644
--- a/polygerrit-ui/app/api/popup.ts
+++ b/polygerrit-ui/app/api/popup.ts
@@ -17,9 +17,10 @@
 
 export declare interface PopupPluginApi {
   /**
-   * Opens the popup, inserts it into DOM over current UI.
-   * Creates the popup if not previously created. Creates popup content element,
-   * if it was provided with constructor.
+   * Opens the popup, inserts it into the DOM over current UI.
+   * Creates the popup if not previously created. Creates and inserts the popup
+   * content element, if a `moduleName` was provided in the constructor.
+   * Otherwise you have to call `appendContent()` when the promise resolves.
    */
   open(): Promise<PopupPluginApi>;
 
@@ -27,4 +28,10 @@
    * Hides the popup.
    */
   close(): void;
+
+  /**
+   * Appends the given element as a child to the popup. Only call this method
+   * when you have called `popup()` without a `moduleName`.
+   */
+  appendContent(el: HTMLElement): void;
 }
diff --git a/polygerrit-ui/app/elements/admin/gr-access-section/gr-access-section.ts b/polygerrit-ui/app/elements/admin/gr-access-section/gr-access-section.ts
index 6efaf0c..2328a05 100644
--- a/polygerrit-ui/app/elements/admin/gr-access-section/gr-access-section.ts
+++ b/polygerrit-ui/app/elements/admin/gr-access-section/gr-access-section.ts
@@ -115,7 +115,7 @@
 
   _updateSection(section: PermissionAccessSection) {
     this._permissions = toSortedPermissionsArray(section.value.permissions);
-    this._originalId = section.id as GitRef;
+    this._originalId = section.id;
   }
 
   _handleAccessSaved() {
@@ -170,7 +170,9 @@
   _computePermissions(
     name: string,
     capabilities?: CapabilityInfoMap,
-    labels?: LabelNameToLabelTypeInfoMap
+    labels?: LabelNameToLabelTypeInfoMap,
+    // This is just for triggering re-computation. We don't use the value.
+    _?: unknown
   ) {
     let allPermissions;
     const section = this.section;
@@ -227,10 +229,10 @@
   _computePermissionName(
     name: string,
     permission: PermissionArrayItem<EditablePermissionInfo>,
-    capabilities: CapabilityInfoMap
-  ) {
+    capabilities?: CapabilityInfoMap
+  ): string | undefined {
     if (name === GLOBAL_NAME) {
-      return capabilities[permission.id].name;
+      return capabilities?.[permission.id].name;
     } else if (AccessPermissions[permission.id]) {
       return AccessPermissions[permission.id].name;
     } else if (permission.value.label) {
@@ -313,7 +315,7 @@
     if (
       editing &&
       this.section &&
-      this._isEditEnabled(canUpload, ownerOf, this.section.id as GitRef)
+      this._isEditEnabled(canUpload, ownerOf, this.section.id)
     ) {
       classList.push('editing');
     }
@@ -331,7 +333,7 @@
   }
 
   _handleAddPermission() {
-    const value = this.$.permissionSelect.value;
+    const value = this.$.permissionSelect.value as GitRef;
     const permission: PermissionArrayItem<EditablePermissionInfo> = {
       id: value,
       value: {rules: {}, added: true},
diff --git a/polygerrit-ui/app/elements/admin/gr-admin-group-list/gr-admin-group-list.ts b/polygerrit-ui/app/elements/admin/gr-admin-group-list/gr-admin-group-list.ts
index b438420..ea70d7e 100644
--- a/polygerrit-ui/app/elements/admin/gr-admin-group-list/gr-admin-group-list.ts
+++ b/polygerrit-ui/app/elements/admin/gr-admin-group-list/gr-admin-group-list.ts
@@ -59,7 +59,7 @@
    * Offset of currently visible query results.
    */
   @property({type: Number})
-  _offset?: number;
+  _offset = 0;
 
   @property({type: String})
   readonly _path = '/admin/groups';
diff --git a/polygerrit-ui/app/elements/admin/gr-admin-view/gr-admin-view_html.ts b/polygerrit-ui/app/elements/admin/gr-admin-view/gr-admin-view_html.ts
index 70e146f..a3afc5c 100644
--- a/polygerrit-ui/app/elements/admin/gr-admin-view/gr-admin-view_html.ts
+++ b/polygerrit-ui/app/elements/admin/gr-admin-view/gr-admin-view_html.ts
@@ -24,11 +24,6 @@
     /* Workaround for empty style block - see https://github.com/Polymer/tools/issues/408 */
   </style>
   <style include="gr-page-nav-styles">
-    gr-dropdown-list {
-      --trigger-style: {
-        text-transform: none;
-      }
-    }
     .breadcrumbText {
       /* Same as dropdown trigger so chevron spacing is consistent. */
       padding: 5px 4px;
diff --git a/polygerrit-ui/app/elements/admin/gr-plugin-config-array-editor/gr-plugin-config-array-editor.ts b/polygerrit-ui/app/elements/admin/gr-plugin-config-array-editor/gr-plugin-config-array-editor.ts
index 9eb9b07..2d3b5c3 100644
--- a/polygerrit-ui/app/elements/admin/gr-plugin-config-array-editor/gr-plugin-config-array-editor.ts
+++ b/polygerrit-ui/app/elements/admin/gr-plugin-config-array-editor/gr-plugin-config-array-editor.ts
@@ -28,7 +28,6 @@
   PluginConfigOptionsChangedEventDetail,
   ArrayPluginOption,
 } from '../gr-repo-plugin-config/gr-repo-plugin-config-types';
-import {KeydownEvent} from '../../../types/events';
 
 declare global {
   interface HTMLElementTagNameMap {
@@ -75,7 +74,7 @@
     this._handleAdd();
   }
 
-  _handleInputKeydown(e: KeydownEvent) {
+  _handleInputKeydown(e: KeyboardEvent) {
     // Enter.
     if (e.keyCode === 13) {
       e.preventDefault();
diff --git a/polygerrit-ui/app/elements/admin/gr-repo-detail-list/gr-repo-detail-list.ts b/polygerrit-ui/app/elements/admin/gr-repo-detail-list/gr-repo-detail-list.ts
index 00c5999..052e07a 100644
--- a/polygerrit-ui/app/elements/admin/gr-repo-detail-list/gr-repo-detail-list.ts
+++ b/polygerrit-ui/app/elements/admin/gr-repo-detail-list/gr-repo-detail-list.ts
@@ -82,7 +82,7 @@
   _loggedIn = false;
 
   @property({type: Number})
-  _offset?: number;
+  _offset = 0;
 
   @property({type: String})
   _repo?: RepoName;
diff --git a/polygerrit-ui/app/elements/admin/gr-repo-list/gr-repo-list.ts b/polygerrit-ui/app/elements/admin/gr-repo-list/gr-repo-list.ts
index beef556..adcfb64 100644
--- a/polygerrit-ui/app/elements/admin/gr-repo-list/gr-repo-list.ts
+++ b/polygerrit-ui/app/elements/admin/gr-repo-list/gr-repo-list.ts
@@ -56,7 +56,7 @@
   params?: AppElementAdminParams;
 
   @property({type: Number})
-  _offset?: number;
+  _offset = 0;
 
   @property({type: String})
   readonly _path = '/admin/repos';
diff --git a/polygerrit-ui/app/elements/admin/gr-repo-plugin-config/gr-repo-plugin-config.ts b/polygerrit-ui/app/elements/admin/gr-repo-plugin-config/gr-repo-plugin-config.ts
index 6e68ae7..32812dd 100644
--- a/polygerrit-ui/app/elements/admin/gr-repo-plugin-config/gr-repo-plugin-config.ts
+++ b/polygerrit-ui/app/elements/admin/gr-repo-plugin-config/gr-repo-plugin-config.ts
@@ -144,7 +144,7 @@
       return html`
         <gr-plugin-config-array-editor
           @plugin-config-option-changed=${this._handleArrayChange}
-          plugin-option="${option}"
+          .pluginOption="${option}"
         ></gr-plugin-config-array-editor>
       `;
     } else if (option.info.type === ConfigParameterInfoType.BOOLEAN) {
@@ -159,7 +159,10 @@
       `;
     } else if (option.info.type === ConfigParameterInfoType.LIST) {
       return html`
-        <gr-select value=${option.info.value} @change=${this._handleListChange}>
+        <gr-select
+          .bindValue=${option.info.value}
+          @change=${this._handleListChange}
+        >
           <select
             data-option-key=${option._key}
             ?disabled=${!option.info.editable}
@@ -177,14 +180,12 @@
     ) {
       return html`
         <iron-input
-          value=${option.info.value}
           @input=${this._handleStringChange}
           data-option-key="${option._key}"
-          ?disabled=${!option.info.editable}
         >
           <input
             is="iron-input"
-            .value="${option.info.value}"
+            .value="${option.info.value ?? ''}"
             @input=${this._handleStringChange}
             data-option-key="${option._key}"
             ?disabled=${!option.info.editable}
diff --git a/polygerrit-ui/app/elements/change-list/gr-change-list-item/gr-change-list-item.ts b/polygerrit-ui/app/elements/change-list/gr-change-list-item/gr-change-list-item.ts
index d160a28..c476d2d 100644
--- a/polygerrit-ui/app/elements/change-list/gr-change-list-item/gr-change-list-item.ts
+++ b/polygerrit-ui/app/elements/change-list/gr-change-list-item/gr-change-list-item.ts
@@ -284,7 +284,7 @@
    * @param truncate whether or not the project name should be
    * truncated. If this value is truthy, the name will be truncated.
    */
-  _computeRepoDisplay(change: ChangeInfo | undefined, truncate: boolean) {
+  _computeRepoDisplay(change?: ChangeInfo) {
     if (!change?.project) {
       return '';
     }
@@ -292,7 +292,19 @@
     if (change.internalHost) {
       str += change.internalHost + '/';
     }
-    str += truncate ? truncatePath(change.project, 2) : change.project;
+    str += change.project;
+    return str;
+  }
+
+  _computeTruncatedRepoDisplay(change?: ChangeInfo) {
+    if (!change?.project) {
+      return '';
+    }
+    let str = '';
+    if (change.internalHost) {
+      str += change.internalHost + '/';
+    }
+    str += truncatePath(change.project, 2);
     return str;
   }
 
diff --git a/polygerrit-ui/app/elements/change-list/gr-change-list-item/gr-change-list-item_html.ts b/polygerrit-ui/app/elements/change-list/gr-change-list-item/gr-change-list-item_html.ts
index f10ffd0..a9b4ece 100644
--- a/polygerrit-ui/app/elements/change-list/gr-change-list-item/gr-change-list-item_html.ts
+++ b/polygerrit-ui/app/elements/change-list/gr-change-list-item/gr-change-list-item_html.ts
@@ -224,14 +224,14 @@
     hidden$="[[_computeIsColumnHidden('Repo', visibleChangeTableColumns)]]"
   >
     <a class="fullRepo" href$="[[_computeRepoUrl(change)]]">
-      [[_computeRepoDisplay(change, false)]]
+      <div class="content">[[_computeRepoDisplay(change)]]</div>
     </a>
     <a
       class="truncatedRepo"
       href$="[[_computeRepoUrl(change)]]"
-      title$="[[_computeRepoDisplay(change, false)]]"
+      title$="[[_computeRepoDisplay(change)]]"
     >
-      [[_computeRepoDisplay(change, true)]]
+      [[_computeTruncatedRepoDisplay(change)]]
     </a>
   </td>
   <td
@@ -273,7 +273,7 @@
     <gr-date-formatter
       withTooltip
       forceRelative
-      relativeOptionNoAge
+      relativeOptionNoAgo
       date-str="[[_computeWaiting(account, change)]]"
     ></gr-date-formatter>
   </td>
diff --git a/polygerrit-ui/app/elements/change-list/gr-change-list-item/gr-change-list-item_test.ts b/polygerrit-ui/app/elements/change-list/gr-change-list-item/gr-change-list-item_test.ts
index aa04784..34cb6eb 100644
--- a/polygerrit-ui/app/elements/change-list/gr-change-list-item/gr-change-list-item_test.ts
+++ b/polygerrit-ui/app/elements/change-list/gr-change-list-item/gr-change-list-item_test.ts
@@ -566,13 +566,13 @@
   });
 
   test('_computeRepoDisplay', () => {
+    assert.equal(element._computeRepoDisplay(change), 'host/a/test/repo');
     assert.equal(
-      element._computeRepoDisplay(change, false),
-      'host/a/test/repo'
+      element._computeTruncatedRepoDisplay(change),
+      'host/…/test/repo'
     );
-    assert.equal(element._computeRepoDisplay(change, true), 'host/…/test/repo');
     delete change.internalHost;
-    assert.equal(element._computeRepoDisplay(change, false), 'a/test/repo');
-    assert.equal(element._computeRepoDisplay(change, true), '…/test/repo');
+    assert.equal(element._computeRepoDisplay(change), 'a/test/repo');
+    assert.equal(element._computeTruncatedRepoDisplay(change), '…/test/repo');
   });
 });
diff --git a/polygerrit-ui/app/elements/change-list/gr-change-list/gr-change-list.ts b/polygerrit-ui/app/elements/change-list/gr-change-list/gr-change-list.ts
index a2a46e0..ac44908 100644
--- a/polygerrit-ui/app/elements/change-list/gr-change-list/gr-change-list.ts
+++ b/polygerrit-ui/app/elements/change-list/gr-change-list/gr-change-list.ts
@@ -46,9 +46,9 @@
   PreferencesInput,
 } from '../../../types/common';
 import {hasAttention} from '../../../utils/attention-set-util';
-import {CustomKeyboardEvent} from '../../../types/events';
+import {IronKeyboardEvent} from '../../../types/events';
 import {fireEvent, fireReload} from '../../../utils/event-util';
-import {isShiftPressed} from '../../../utils/dom-util';
+import {isShiftPressed, modifierPressed} from '../../../utils/dom-util';
 import {ScrollMode} from '../../../constants/constants';
 
 const NUMBER_FIXED_COLUMNS = 3;
@@ -157,6 +157,8 @@
 
   private readonly restApiService = appContext.restApiService;
 
+  private readonly shortcuts = appContext.shortcutsService;
+
   override keyboardShortcuts() {
     return {
       [Shortcut.CURSOR_NEXT_CHANGE]: '_nextChange',
@@ -176,9 +178,7 @@
     super();
     this.cursor.scrollMode = ScrollMode.KEEP_VISIBLE;
     this.cursor.focusOnMove = true;
-    this.addEventListener('keydown', e =>
-      this._scopedKeydownHandler(e as unknown as CustomKeyboardEvent)
-    );
+    this.addEventListener('keydown', e => this._scopedKeydownHandler(e));
   }
 
   override ready() {
@@ -210,10 +210,10 @@
    *
    * Context: Issue 7294
    */
-  _scopedKeydownHandler(e: CustomKeyboardEvent) {
+  _scopedKeydownHandler(e: KeyboardEvent) {
     if (e.keyCode === 13) {
       // Enter.
-      this._openChange(e);
+      this.openChange(e);
     }
   }
 
@@ -406,8 +406,8 @@
     );
   }
 
-  _nextChange(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e) || this.modifierPressed(e)) {
+  _nextChange(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e) || this.modifierPressed(e)) {
       return;
     }
 
@@ -418,8 +418,8 @@
     this.selectedIndex = this.cursor.index;
   }
 
-  _prevChange(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e) || this.modifierPressed(e)) {
+  _prevChange(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e) || this.modifierPressed(e)) {
       return;
     }
 
@@ -430,19 +430,21 @@
     this.selectedIndex = this.cursor.index;
   }
 
-  _openChange(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e) || this.modifierPressed(e)) {
-      return;
-    }
+  _openChange(e: IronKeyboardEvent) {
+    if (this.modifierPressed(e)) return;
+    this.openChange(e.detail.keyboardEvent);
+  }
 
+  openChange(e: KeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e) || modifierPressed(e)) return;
     e.preventDefault();
     const change = this._changeForIndex(this.selectedIndex);
     if (change) GerritNav.navigateToChange(change);
   }
 
-  _nextPage(e: CustomKeyboardEvent) {
+  _nextPage(e: IronKeyboardEvent) {
     if (
-      this.shouldSuppressKeyboardShortcut(e) ||
+      this.shortcuts.shouldSuppress(e) ||
       (this.modifierPressed(e) && !isShiftPressed(e))
     ) {
       return;
@@ -452,9 +454,9 @@
     fireEvent(this, 'next-page');
   }
 
-  _prevPage(e: CustomKeyboardEvent) {
+  _prevPage(e: IronKeyboardEvent) {
     if (
-      this.shouldSuppressKeyboardShortcut(e) ||
+      this.shortcuts.shouldSuppress(e) ||
       (this.modifierPressed(e) && !isShiftPressed(e))
     ) {
       return;
@@ -469,8 +471,8 @@
     );
   }
 
-  _toggleChangeReviewed(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e) || this.modifierPressed(e)) {
+  _toggleChangeReviewed(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e) || this.modifierPressed(e)) {
       return;
     }
 
@@ -488,8 +490,8 @@
     changeEl.toggleReviewed();
   }
 
-  _refreshChangeList(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) {
+  _refreshChangeList(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) {
       return;
     }
 
@@ -497,8 +499,8 @@
     fireReload(this);
   }
 
-  _toggleChangeStar(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e) || this.modifierPressed(e)) {
+  _toggleChangeStar(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e) || this.modifierPressed(e)) {
       return;
     }
 
diff --git a/polygerrit-ui/app/elements/change-list/gr-change-list/gr-change-list_test.js b/polygerrit-ui/app/elements/change-list/gr-change-list/gr-change-list_test.js
index 7b226e7..4956380 100644
--- a/polygerrit-ui/app/elements/change-list/gr-change-list/gr-change-list_test.js
+++ b/polygerrit-ui/app/elements/change-list/gr-change-list/gr-change-list_test.js
@@ -19,8 +19,7 @@
 import './gr-change-list.js';
 import {afterNextRender} from '@polymer/polymer/lib/utils/render-status.js';
 import {GerritNav} from '../../core/gr-navigation/gr-navigation.js';
-import {mockPromise, TestKeyboardShortcutBinder} from '../../../test/test-utils.js';
-import {Shortcut} from '../../../mixins/keyboard-shortcut-mixin/keyboard-shortcut-mixin.js';
+import {mockPromise} from '../../../test/test-utils.js';
 import {YOUR_TURN} from '../../core/gr-navigation/gr-navigation.js';
 
 const basicFixture = fixtureFromElement('gr-change-list');
@@ -28,22 +27,6 @@
 suite('gr-change-list basic tests', () => {
   let element;
 
-  suiteSetup(() => {
-    const kb = TestKeyboardShortcutBinder.push();
-    kb.bindShortcut(Shortcut.CURSOR_NEXT_CHANGE, 'j');
-    kb.bindShortcut(Shortcut.CURSOR_PREV_CHANGE, 'k');
-    kb.bindShortcut(Shortcut.OPEN_CHANGE, 'o');
-    kb.bindShortcut(Shortcut.REFRESH_CHANGE_LIST, 'shift+r');
-    kb.bindShortcut(Shortcut.TOGGLE_CHANGE_REVIEWED, 'r');
-    kb.bindShortcut(Shortcut.TOGGLE_CHANGE_STAR, 's');
-    kb.bindShortcut(Shortcut.NEXT_PAGE, 'n');
-    kb.bindShortcut(Shortcut.NEXT_PAGE, 'p');
-  });
-
-  suiteTeardown(() => {
-    TestKeyboardShortcutBinder.pop();
-  });
-
   setup(() => {
     element = basicFixture.instantiate();
   });
@@ -495,11 +478,11 @@
         assert.deepEqual(navStub.lastCall.args[0], {_number: 4},
             'Should navigate to /c/4/');
 
-        MockInteractions.pressAndReleaseKeyOn(element, 82); // 'r'
+        MockInteractions.keyUpOn(element, 82); // 'r'
         const change = element._changeForIndex(element.selectedIndex);
         assert.equal(change.reviewed, true,
             'Should mark change as reviewed');
-        MockInteractions.pressAndReleaseKeyOn(element, 82); // 'r'
+        MockInteractions.keyUpOn(element, 82); // 'r'
         assert.equal(change.reviewed, false,
             'Should mark change as unreviewed');
         promise.resolve();
diff --git a/polygerrit-ui/app/elements/change-list/gr-dashboard-view/gr-dashboard-view_html.ts b/polygerrit-ui/app/elements/change-list/gr-dashboard-view/gr-dashboard-view_html.ts
index 4778890..a55befb 100644
--- a/polygerrit-ui/app/elements/change-list/gr-dashboard-view/gr-dashboard-view_html.ts
+++ b/polygerrit-ui/app/elements/change-list/gr-dashboard-view/gr-dashboard-view_html.ts
@@ -42,11 +42,6 @@
       justify-content: space-between;
       padding: var(--spacing-xs) var(--spacing-l);
     }
-    .banner gr-button {
-      --gr-button: {
-        color: var(--primary-text-color);
-      }
-    }
     .hide {
       display: none;
     }
diff --git a/polygerrit-ui/app/elements/change-list/gr-repo-header/gr-repo-header.ts b/polygerrit-ui/app/elements/change-list/gr-repo-header/gr-repo-header.ts
index 9242a58..d8949ed 100644
--- a/polygerrit-ui/app/elements/change-list/gr-repo-header/gr-repo-header.ts
+++ b/polygerrit-ui/app/elements/change-list/gr-repo-header/gr-repo-header.ts
@@ -72,7 +72,7 @@
       <h1 class="heading-1">${this.repo}</h1>
       <hr />
       <div>
-        <span>Detail:</span> <a href="${this._repoUrl}">Repo settings</a>
+        <span>Detail:</span> <a href="${this._repoUrl!}">Repo settings</a>
       </div>
       ${this._renderLinks(this._webLinks)}
     </div>`;
diff --git a/polygerrit-ui/app/elements/change-list/gr-user-header/gr-user-header.ts b/polygerrit-ui/app/elements/change-list/gr-user-header/gr-user-header.ts
index e87b4f9..50de7b9 100644
--- a/polygerrit-ui/app/elements/change-list/gr-user-header/gr-user-header.ts
+++ b/polygerrit-ui/app/elements/change-list/gr-user-header/gr-user-header.ts
@@ -64,7 +64,7 @@
   }
 
   override render() {
-    return html` <gr-avatar
+    return html`<gr-avatar
         .account="${this._accountDetails}"
         .imageSize=${100}
         aria-label="Account avatar"
@@ -85,7 +85,7 @@
         <div>
           <span>Joined:</span>
           <gr-date-formatter
-            date-str="${this._computeDetail(
+            dateStr="${this._computeDetail(
               this._accountDetails,
               'registered_on'
             )}"
@@ -95,10 +95,10 @@
         <gr-endpoint-decorator name="user-header">
           <gr-endpoint-param
             name="accountDetails"
-            value="${this._accountDetails}"
+            .value="${this._accountDetails}"
           >
           </gr-endpoint-param>
-          <gr-endpoint-param name="loggedIn" value="${this.loggedIn}">
+          <gr-endpoint-param name="loggedIn" .value="${this.loggedIn}">
           </gr-endpoint-param>
         </gr-endpoint-decorator>
       </div>
diff --git a/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions_html.ts b/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions_html.ts
index b5f55ca..d21c29f 100644
--- a/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions_html.ts
+++ b/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions_html.ts
@@ -33,6 +33,9 @@
       /* px because don't have the same font size */
       margin-left: 8px;
     }
+    gr-button {
+      display: block;
+    }
     #actionLoadingMessage {
       align-items: center;
       color: var(--deemphasized-text-color);
@@ -57,10 +60,8 @@
         flex-wrap: wrap;
       }
       gr-button {
-        --gr-button: {
-          padding: var(--spacing-m);
-          white-space: nowrap;
-        }
+        --gr-button-padding: var(--spacing-m);
+        white-space: nowrap;
       }
       gr-button,
       gr-dropdown {
diff --git a/polygerrit-ui/app/elements/change/gr-change-metadata/gr-change-metadata.ts b/polygerrit-ui/app/elements/change/gr-change-metadata/gr-change-metadata.ts
index 08ad2bd..ba62ec3 100644
--- a/polygerrit-ui/app/elements/change/gr-change-metadata/gr-change-metadata.ts
+++ b/polygerrit-ui/app/elements/change/gr-change-metadata/gr-change-metadata.ts
@@ -15,6 +15,7 @@
  * limitations under the License.
  */
 import '../../../styles/shared-styles';
+import '../../../styles/gr-font-styles';
 import '../../../styles/gr-change-metadata-shared-styles';
 import '../../../styles/gr-change-view-integration-shared-styles';
 import '../../plugins/gr-endpoint-decorator/gr-endpoint-decorator';
diff --git a/polygerrit-ui/app/elements/change/gr-change-metadata/gr-change-metadata_html.ts b/polygerrit-ui/app/elements/change/gr-change-metadata/gr-change-metadata_html.ts
index a37daaa..26d1277 100644
--- a/polygerrit-ui/app/elements/change/gr-change-metadata/gr-change-metadata_html.ts
+++ b/polygerrit-ui/app/elements/change/gr-change-metadata/gr-change-metadata_html.ts
@@ -20,6 +20,9 @@
   <style include="gr-change-metadata-shared-styles">
     /* Workaround for empty style block - see https://github.com/Polymer/tools/issues/408 */
   </style>
+  <style include="gr-font-styles">
+    /* Workaround for empty style block - see https://github.com/Polymer/tools/issues/408 */
+  </style>
   <style include="shared-styles">
     :host {
       display: table;
@@ -94,7 +97,6 @@
       max-width: 285px;
     }
     .metadata-title {
-      font-weight: var(--font-weight-bold);
       color: var(--deemphasized-text-color);
       padding-left: var(--metadata-horizontal-padding);
     }
@@ -114,7 +116,7 @@
   </style>
   <gr-external-style id="externalStyle" name="change-metadata">
     <div class="metadata-header">
-      <h3 class="metadata-title">Change Info</h3>
+      <h3 class="metadata-title heading-3">Change Info</h3>
       <gr-button link="" class="show-all-button" on-click="_onShowAllClick"
         >[[_computeShowAllLabelText(_showAllSections)]]
         <iron-icon
diff --git a/polygerrit-ui/app/elements/change/gr-change-requirements/gr-change-requirements.ts b/polygerrit-ui/app/elements/change/gr-change-requirements/gr-change-requirements.ts
index 414784c..725bb24 100644
--- a/polygerrit-ui/app/elements/change/gr-change-requirements/gr-change-requirements.ts
+++ b/polygerrit-ui/app/elements/change/gr-change-requirements/gr-change-requirements.ts
@@ -15,6 +15,7 @@
  * limitations under the License.
  */
 import '../../../styles/shared-styles';
+import '../../../styles/gr-font-styles';
 import '../../shared/gr-button/gr-button';
 import '../../shared/gr-icons/gr-icons';
 import '../../shared/gr-label-info/gr-label-info';
diff --git a/polygerrit-ui/app/elements/change/gr-change-requirements/gr-change-requirements_html.ts b/polygerrit-ui/app/elements/change/gr-change-requirements/gr-change-requirements_html.ts
index d824d94..8161592 100644
--- a/polygerrit-ui/app/elements/change/gr-change-requirements/gr-change-requirements_html.ts
+++ b/polygerrit-ui/app/elements/change/gr-change-requirements/gr-change-requirements_html.ts
@@ -17,6 +17,9 @@
 import {html} from '@polymer/polymer/lib/utils/html-tag';
 
 export const htmlTemplate = html`
+  <style include="gr-font-styles">
+    /* Workaround for empty style block - see https://github.com/Polymer/tools/issues/408 */
+  </style>
   <style include="shared-styles">
     :host {
       display: table;
@@ -104,7 +107,7 @@
       padding-left: 0;
     }
   </style>
-  <h3 class="metadata-title">Submit requirements</h3>
+  <h3 class="metadata-title heading-3">Submit requirements</h3>
   <template is="dom-repeat" items="[[_requirements]]">
     <gr-endpoint-decorator
       class="submit-requirement-endpoints"
diff --git a/polygerrit-ui/app/elements/change/gr-change-summary/gr-change-summary.ts b/polygerrit-ui/app/elements/change/gr-change-summary/gr-change-summary.ts
index 831a309..ad8f72f 100644
--- a/polygerrit-ui/app/elements/change/gr-change-summary/gr-change-summary.ts
+++ b/polygerrit-ui/app/elements/change/gr-change-summary/gr-change-summary.ts
@@ -33,6 +33,7 @@
 import {Action, Category, Link, RunStatus} from '../../../api/checks';
 import {fireShowPrimaryTab} from '../../../utils/event-util';
 import '../../shared/gr-avatar/gr-avatar';
+import '../../checks/gr-checks-action';
 import {
   firstPrimaryLink,
   getResultsOf,
@@ -289,8 +290,6 @@
           color: var(--success-foreground);
         }
         .checksChip.timelapse {
-        }
-        .checksChip.timelapse {
           border-color: var(--gray-foreground);
           background: var(--gray-background);
         }
@@ -514,7 +513,7 @@
         .actions gr-checks-action,
         .actions gr-dropdown {
           vertical-align: top;
-          --padding: 0 var(--spacing-m);
+          --gr-button-padding: 0 var(--spacing-m);
         }
         .actions #moreMessage {
           display: none;
@@ -662,7 +661,7 @@
     const handler = () => this.onChipClick({statusOrCategory});
     return html`<gr-checks-chip
       .statusOrCategory="${statusOrCategory}"
-      .text="${count}"
+      .text="${`${count}`}"
       @click="${handler}"
       @keydown="${(e: KeyboardEvent) => handleSpaceOrEnter(e, handler)}"
     ></gr-checks-chip>`;
diff --git a/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view.ts b/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view.ts
index 3396e13..fd7b5d1 100644
--- a/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view.ts
+++ b/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view.ts
@@ -48,6 +48,7 @@
 import {
   KeyboardShortcutMixin,
   Shortcut,
+  ShortcutSection,
 } from '../../../mixins/keyboard-shortcut-mixin/keyboard-shortcut-mixin';
 import {GrEditConstants} from '../../edit/gr-edit-constants';
 import {pluralize} from '../../../utils/string-util';
@@ -157,8 +158,9 @@
   ParsedChangeInfo,
 } from '../../../types/types';
 import {
+  IronKeyboardEventListener,
   CloseFixPreviewEvent,
-  CustomKeyboardEvent,
+  IronKeyboardEvent,
   EditableContentSaveEvent,
   EventType,
   OpenFixPreviewEvent,
@@ -536,7 +538,7 @@
   @property({type: Boolean})
   _showRobotCommentsButton = false;
 
-  _throttledToggleChangeStar?: EventListener;
+  _throttledToggleChangeStar?: IronKeyboardEventListener;
 
   @property({type: Boolean})
   _showChecksTab = false;
@@ -563,6 +565,8 @@
 
   private readonly commentsService = appContext.commentsService;
 
+  private readonly shortcuts = appContext.shortcutsService;
+
   private replyDialogResizeObserver?: ResizeObserver;
 
   override keyboardShortcuts() {
@@ -637,8 +641,8 @@
 
   override connectedCallback() {
     super.connectedCallback();
-    this._throttledToggleChangeStar = throttleWrap(e =>
-      this._handleToggleChangeStar(e as CustomKeyboardEvent)
+    this._throttledToggleChangeStar = throttleWrap<IronKeyboardEvent>(e =>
+      this._handleToggleChangeStar(e)
     );
     this._getServerConfig().then(config => {
       this._serverConfig = config;
@@ -747,8 +751,8 @@
     if (e.detail.fixApplied) fireReload(this);
   }
 
-  _handleToggleDiffMode(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e) || this.modifierPressed(e)) {
+  _handleToggleDiffMode(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e) || this.modifierPressed(e)) {
       return;
     }
 
@@ -1491,8 +1495,8 @@
     return label;
   }
 
-  _handleOpenReplyDialog(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e) || this.modifierPressed(e)) {
+  _handleOpenReplyDialog(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e) || this.modifierPressed(e)) {
       return;
     }
     this._getLoggedIn().then(isLoggedIn => {
@@ -1506,8 +1510,8 @@
     });
   }
 
-  _handleOpenDownloadDialogShortcut(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e) || this.modifierPressed(e)) {
+  _handleOpenDownloadDialogShortcut(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e) || this.modifierPressed(e)) {
       return;
     }
 
@@ -1515,8 +1519,8 @@
     this._handleOpenDownloadDialog();
   }
 
-  _handleEditTopic(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e) || this.modifierPressed(e)) {
+  _handleEditTopic(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e) || this.modifierPressed(e)) {
       return;
     }
 
@@ -1524,8 +1528,8 @@
     this.$.metadata.editTopic();
   }
 
-  _handleOpenSubmitDialog(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e) || !this._submitEnabled) {
+  _handleOpenSubmitDialog(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e) || !this._submitEnabled) {
       return;
     }
 
@@ -1533,8 +1537,8 @@
     this.$.actions.showSubmitDialog();
   }
 
-  _handleToggleAttentionSet(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) {
+  _handleToggleAttentionSet(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) {
       return;
     }
     if (!this._change || !this._account?._account_id) return;
@@ -1575,8 +1579,8 @@
     this._change = {...this._change};
   }
 
-  _handleDiffAgainstBase(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) {
+  _handleDiffAgainstBase(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) {
       return;
     }
     assertIsDefined(this._change, '_change');
@@ -1589,8 +1593,8 @@
     GerritNav.navigateToChange(this._change, this._patchRange.patchNum);
   }
 
-  _handleDiffBaseAgainstLeft(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) {
+  _handleDiffBaseAgainstLeft(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) {
       return;
     }
     assertIsDefined(this._change, '_change');
@@ -1603,8 +1607,8 @@
     GerritNav.navigateToChange(this._change, this._patchRange.basePatchNum);
   }
 
-  _handleDiffAgainstLatest(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) {
+  _handleDiffAgainstLatest(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) {
       return;
     }
     assertIsDefined(this._change, '_change');
@@ -1622,8 +1626,8 @@
     );
   }
 
-  _handleDiffRightAgainstLatest(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) {
+  _handleDiffRightAgainstLatest(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) {
       return;
     }
     assertIsDefined(this._change, '_change');
@@ -1641,8 +1645,8 @@
     );
   }
 
-  _handleDiffBaseAgainstLatest(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) {
+  _handleDiffBaseAgainstLatest(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) {
       return;
     }
     assertIsDefined(this._change, '_change');
@@ -1659,24 +1663,24 @@
     GerritNav.navigateToChange(this._change, latestPatchNum);
   }
 
-  _handleRefreshChange(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) {
+  _handleRefreshChange(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) {
       return;
     }
     e.preventDefault();
     fireReload(this, true);
   }
 
-  _handleToggleChangeStar(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e) || this.modifierPressed(e)) {
+  _handleToggleChangeStar(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e) || this.modifierPressed(e)) {
       return;
     }
     e.preventDefault();
     this.$.changeStar.toggleStar();
   }
 
-  _handleUpToDashboard(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e) || this.modifierPressed(e)) {
+  _handleUpToDashboard(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e) || this.modifierPressed(e)) {
       return;
     }
 
@@ -1684,8 +1688,8 @@
     this._determinePageBack();
   }
 
-  _handleExpandAllMessages(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e) || this.modifierPressed(e)) {
+  _handleExpandAllMessages(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e) || this.modifierPressed(e)) {
       return;
     }
 
@@ -1695,8 +1699,8 @@
     }
   }
 
-  _handleCollapseAllMessages(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e) || this.modifierPressed(e)) {
+  _handleCollapseAllMessages(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e) || this.modifierPressed(e)) {
       return;
     }
 
@@ -1706,8 +1710,8 @@
     }
   }
 
-  _handleOpenDiffPrefsShortcut(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e) || this.modifierPressed(e)) {
+  _handleOpenDiffPrefsShortcut(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e) || this.modifierPressed(e)) {
       return;
     }
 
@@ -2644,6 +2648,10 @@
       '#relatedChanges'
     );
   }
+
+  createTitle(shortcutName: Shortcut, section: ShortcutSection) {
+    return this.shortcuts.createTitle(shortcutName, section);
+  }
 }
 
 declare global {
diff --git a/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view_test.ts b/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view_test.ts
index 6668e15..a82fceb 100644
--- a/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view_test.ts
+++ b/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view_test.ts
@@ -35,12 +35,7 @@
 import {EventType, PluginApi} from '../../../api/plugin';
 
 import 'lodash/lodash';
-import {
-  mockPromise,
-  stubRestApi,
-  TestKeyboardShortcutBinder,
-} from '../../../test/test-utils';
-import {Shortcut} from '../../../mixins/keyboard-shortcut-mixin/keyboard-shortcut-mixin';
+import {mockPromise, stubRestApi} from '../../../test/test-utils';
 import {
   createAppElementChangeViewParams,
   createApproval,
@@ -87,13 +82,17 @@
 } from '../../../types/common';
 import {
   pressAndReleaseKeyOn,
+  keyUpOn,
   tap,
 } from '@polymer/iron-test-helpers/mock-interactions';
 import {GrEditControls} from '../../edit/gr-edit-controls/gr-edit-controls';
 import {AppElementChangeViewParams} from '../../gr-app-types';
 import {SinonFakeTimers, SinonStubbedMember} from 'sinon';
 import {RestApiService} from '../../../services/gr-rest-api/gr-rest-api';
-import {CustomKeyboardEvent} from '../../../types/events';
+import {
+  IronKeyboardEvent,
+  IronKeyboardEventDetail,
+} from '../../../types/events';
 import {CommentThread, UIRobot} from '../../../utils/comment-util';
 import {GerritView} from '../../../services/router/router-model';
 import {ParsedChangeInfo} from '../../../types/types';
@@ -111,25 +110,6 @@
     typeof GerritNav.navigateToChange
   >;
 
-  suiteSetup(() => {
-    const kb = TestKeyboardShortcutBinder.push();
-    kb.bindShortcut(Shortcut.SEND_REPLY, 'ctrl+enter');
-    kb.bindShortcut(Shortcut.REFRESH_CHANGE, 'shift+r');
-    kb.bindShortcut(Shortcut.OPEN_REPLY_DIALOG, 'a');
-    kb.bindShortcut(Shortcut.OPEN_DOWNLOAD_DIALOG, 'd');
-    kb.bindShortcut(Shortcut.TOGGLE_DIFF_MODE, 'm');
-    kb.bindShortcut(Shortcut.TOGGLE_CHANGE_STAR, 's');
-    kb.bindShortcut(Shortcut.UP_TO_DASHBOARD, 'u');
-    kb.bindShortcut(Shortcut.EXPAND_ALL_MESSAGES, 'x');
-    kb.bindShortcut(Shortcut.COLLAPSE_ALL_MESSAGES, 'z');
-    kb.bindShortcut(Shortcut.OPEN_DIFF_PREFS, ',');
-    kb.bindShortcut(Shortcut.EDIT_TOPIC, 't');
-  });
-
-  suiteTeardown(() => {
-    TestKeyboardShortcutBinder.pop();
-  });
-
   const ROBOT_COMMENTS_LIMIT = 10;
 
   // TODO: should have a mock service to generate VALID fake data
@@ -423,8 +403,7 @@
       patchNum: 3 as RevisionPatchSetNum,
       basePatchNum: 1 as BasePatchSetNum,
     };
-    sinon.stub(element, 'shouldSuppressKeyboardShortcut').returns(false);
-    element._handleDiffAgainstBase(new CustomEvent('') as CustomKeyboardEvent);
+    element._handleDiffAgainstBase(new CustomEvent('') as IronKeyboardEvent);
     assert(navigateToChangeStub.called);
     const args = navigateToChangeStub.getCall(0).args;
     assert.equal(args[0], element._change);
@@ -440,10 +419,7 @@
       basePatchNum: 1 as BasePatchSetNum,
       patchNum: 3 as RevisionPatchSetNum,
     };
-    sinon.stub(element, 'shouldSuppressKeyboardShortcut').returns(false);
-    element._handleDiffAgainstLatest(
-      new CustomEvent('') as CustomKeyboardEvent
-    );
+    element._handleDiffAgainstLatest(new CustomEvent('') as IronKeyboardEvent);
     assert(navigateToChangeStub.called);
     const args = navigateToChangeStub.getCall(0).args;
     assert.equal(args[0], element._change);
@@ -460,9 +436,8 @@
       patchNum: 3 as RevisionPatchSetNum,
       basePatchNum: 1 as BasePatchSetNum,
     };
-    sinon.stub(element, 'shouldSuppressKeyboardShortcut').returns(false);
     element._handleDiffBaseAgainstLeft(
-      new CustomEvent('') as CustomKeyboardEvent
+      new CustomEvent('') as IronKeyboardEvent
     );
     assert(navigateToChangeStub.called);
     const args = navigateToChangeStub.getCall(0).args;
@@ -479,9 +454,8 @@
       basePatchNum: 1 as BasePatchSetNum,
       patchNum: 3 as RevisionPatchSetNum,
     };
-    sinon.stub(element, 'shouldSuppressKeyboardShortcut').returns(false);
     element._handleDiffRightAgainstLatest(
-      new CustomEvent('') as CustomKeyboardEvent
+      new CustomEvent('') as IronKeyboardEvent
     );
     assert(navigateToChangeStub.called);
     const args = navigateToChangeStub.getCall(0).args;
@@ -498,9 +472,8 @@
       basePatchNum: 1 as BasePatchSetNum,
       patchNum: 3 as RevisionPatchSetNum,
     };
-    sinon.stub(element, 'shouldSuppressKeyboardShortcut').returns(false);
     element._handleDiffBaseAgainstLatest(
-      new CustomEvent('') as CustomKeyboardEvent
+      new CustomEvent('') as IronKeyboardEvent
     );
     assert(navigateToChangeStub.called);
     const args = navigateToChangeStub.getCall(0).args;
@@ -524,20 +497,15 @@
       basePatchNum: 1 as BasePatchSetNum,
       patchNum: 3 as RevisionPatchSetNum,
     };
-    sinon.stub(element, 'shouldSuppressKeyboardShortcut').returns(false);
 
     assert.isNotOk(element._change.attention_set);
     await element._getLoggedIn();
     await element.restApiService.getAccount();
-    element._handleToggleAttentionSet(
-      new CustomEvent('') as CustomKeyboardEvent
-    );
+    element._handleToggleAttentionSet(new CustomEvent('') as IronKeyboardEvent);
     assert.isTrue(addToAttentionSetStub.called);
     assert.isFalse(removeFromAttentionSetStub.called);
 
-    element._handleToggleAttentionSet(
-      new CustomEvent('') as CustomKeyboardEvent
-    );
+    element._handleToggleAttentionSet(new CustomEvent('') as IronKeyboardEvent);
     assert.isTrue(removeFromAttentionSetStub.called);
   });
 
@@ -682,7 +650,7 @@
       sinon.stub(element, '_getLoggedIn').returns(Promise.resolve(false));
       const loggedInErrorSpy = sinon.spy();
       element.addEventListener('show-auth-required', loggedInErrorSpy);
-      pressAndReleaseKeyOn(element, 65, null, 'a');
+      keyUpOn(element, 65, null, 'a');
       await flush();
       assert.isFalse(element.$.replyOverlay.opened);
       assert.isTrue(loggedInErrorSpy.called);
@@ -715,7 +683,7 @@
 
       const openSpy = sinon.spy(element, '_openReplyDialog');
 
-      pressAndReleaseKeyOn(element, 65, null, 'a');
+      keyUpOn(element, 65, null, 'a');
       await flush();
       assert.isTrue(element.$.replyOverlay.opened);
       element.$.replyOverlay.close();
@@ -828,7 +796,7 @@
       const stub = sinon
         .stub(element.$.downloadOverlay, 'open')
         .returns(Promise.resolve());
-      pressAndReleaseKeyOn(element, 68, null, 'd');
+      keyUpOn(element, 68, null, 'd');
       assert.isTrue(stub.called);
     });
 
@@ -852,12 +820,13 @@
     });
 
     test('m should toggle diff mode', () => {
-      sinon.stub(element, 'shouldSuppressKeyboardShortcut').returns(false);
       const setModeStub = sinon.stub(
         element.$.fileListHeader,
         'setDiffViewMode'
       );
-      const e = {preventDefault: () => {}} as CustomKeyboardEvent;
+      const e = new CustomEvent<IronKeyboardEventDetail>('keydown', {
+        detail: {keyboardEvent: new KeyboardEvent('keydown'), key: 'x'},
+      });
       flush();
 
       element.viewState.diffMode = DiffViewMode.SIDE_BY_SIDE;
diff --git a/polygerrit-ui/app/elements/change/gr-commit-info/gr-commit-info.ts b/polygerrit-ui/app/elements/change/gr-commit-info/gr-commit-info.ts
index 4326939..0ce3b07 100644
--- a/polygerrit-ui/app/elements/change/gr-commit-info/gr-commit-info.ts
+++ b/polygerrit-ui/app/elements/change/gr-commit-info/gr-commit-info.ts
@@ -73,9 +73,9 @@
         )}</a
       >
       <gr-copy-clipboard
-        hasTooltip=""
-        .buttonTitle="Copy full SHA to clipboard"
-        hideInput=""
+        hastooltip
+        .buttonTitle="${'Copy full SHA to clipboard'}"
+        hideinput
         .text="${this.commitInfo?.commit}"
       >
       </gr-copy-clipboard>
diff --git a/polygerrit-ui/app/elements/change/gr-confirm-submit-dialog/gr-confirm-submit-dialog.ts b/polygerrit-ui/app/elements/change/gr-confirm-submit-dialog/gr-confirm-submit-dialog.ts
index 3ab9c82..9d371d3 100644
--- a/polygerrit-ui/app/elements/change/gr-confirm-submit-dialog/gr-confirm-submit-dialog.ts
+++ b/polygerrit-ui/app/elements/change/gr-confirm-submit-dialog/gr-confirm-submit-dialog.ts
@@ -112,8 +112,8 @@
         id="commentList"
         .threads="${this._computeUnresolvedThreads(this.commentThreads)}"
         .change="${this.change}"
-        .change-num="${this.change?._number}"
-        logged-in="true"
+        .changeNum="${this.change?._number}"
+        logged-in
         hide-dropdown
       >
       </gr-thread-list>
diff --git a/polygerrit-ui/app/elements/change/gr-file-list-header/gr-file-list-header.ts b/polygerrit-ui/app/elements/change/gr-file-list-header/gr-file-list-header.ts
index bdc6a43..8aef3c0 100644
--- a/polygerrit-ui/app/elements/change/gr-file-list-header/gr-file-list-header.ts
+++ b/polygerrit-ui/app/elements/change/gr-file-list-header/gr-file-list-header.ts
@@ -44,7 +44,12 @@
 import {DiffViewMode} from '../../../constants/constants';
 import {GrButton} from '../../shared/gr-button/gr-button';
 import {fireEvent} from '../../../utils/event-util';
-import {KeyboardShortcutMixin} from '../../../mixins/keyboard-shortcut-mixin/keyboard-shortcut-mixin';
+import {
+  KeyboardShortcutMixin,
+  Shortcut,
+  ShortcutSection,
+} from '../../../mixins/keyboard-shortcut-mixin/keyboard-shortcut-mixin';
+import {appContext} from '../../../services/app-context';
 
 declare global {
   interface HTMLElementTagNameMap {
@@ -144,6 +149,8 @@
   @property({type: Object})
   revisionInfo?: RevisionInfo;
 
+  private readonly shortcuts = appContext.shortcutsService;
+
   setDiffViewMode(mode: DiffViewMode) {
     this.$.modeSelect.setMode(mode);
   }
@@ -217,4 +224,8 @@
     }
     return 'patchInfoOldPatchSet';
   }
+
+  createTitle(shortcutName: Shortcut, section: ShortcutSection) {
+    return this.shortcuts.createTitle(shortcutName, section);
+  }
 }
diff --git a/polygerrit-ui/app/elements/change/gr-file-list-header/gr-file-list-header_html.ts b/polygerrit-ui/app/elements/change/gr-file-list-header/gr-file-list-header_html.ts
index 85f0330..5972393 100644
--- a/polygerrit-ui/app/elements/change/gr-file-list-header/gr-file-list-header_html.ts
+++ b/polygerrit-ui/app/elements/change/gr-file-list-header/gr-file-list-header_html.ts
@@ -93,9 +93,7 @@
     }
     .fileViewActions gr-button {
       margin: 0;
-      --gr-button: {
-        padding: 2px 4px;
-      }
+      --gr-button-padding: 2px 4px;
     }
     .editMode .hideOnEdit {
       display: none;
@@ -180,13 +178,9 @@
           hidden$="[[_computePrefsButtonHidden(diffPrefs, diffPrefsDisabled)]]"
           hidden=""
         >
-          <gr-tooltip-content
-            has-tooltip
-            title="Diff preferences"
-          >
+          <gr-tooltip-content has-tooltip title="Diff preferences">
             <gr-button
               link=""
-
               class="prefsButton desktop"
               on-click="_handlePrefsTap"
               ><iron-icon icon="gr-icons:settings"></iron-icon
@@ -201,10 +195,7 @@
           title="[[createTitle(Shortcut.OPEN_DOWNLOAD_DIALOG,
                    ShortcutSection.ACTIONS)]]"
         >
-          <gr-button
-            link=""
-            class="download"
-            on-click="_handleDownloadTap"
+          <gr-button link="" class="download" on-click="_handleDownloadTap"
             >Download</gr-button
           >
         </gr-tooltip-content>
@@ -214,24 +205,20 @@
         if="[[_fileListActionsVisible(shownFileCount, _maxFilesForBulkActions)]]"
       >
         <gr-tooltip-content
-            has-tooltip
-            title="[[createTitle(Shortcut.TOGGLE_ALL_INLINE_DIFFS,
-                  ShortcutSection.FILE_LIST)]]">
-          <gr-button
-            id="expandBtn"
-            link=""
-
-            on-click="_expandAllDiffs"
+          has-tooltip
+          title="[[createTitle(Shortcut.TOGGLE_ALL_INLINE_DIFFS,
+                  ShortcutSection.FILE_LIST)]]"
+        >
+          <gr-button id="expandBtn" link="" on-click="_expandAllDiffs"
             >Expand All</gr-button
           >
+        </gr-tooltip-content>
         <gr-tooltip-content
-            has-tooltip
-            title="[[createTitle(Shortcut.TOGGLE_ALL_INLINE_DIFFS,
-                  ShortcutSection.FILE_LIST)]]">
-          <gr-button
-            id="collapseBtn"
-            link=""
-            on-click="_collapseAllDiffs"
+          has-tooltip
+          title="[[createTitle(Shortcut.TOGGLE_ALL_INLINE_DIFFS,
+                  ShortcutSection.FILE_LIST)]]"
+        >
+          <gr-button id="collapseBtn" link="" on-click="_collapseAllDiffs"
             >Collapse All</gr-button
           >
         </gr-tooltip-content>
diff --git a/polygerrit-ui/app/elements/change/gr-file-list/gr-file-list.ts b/polygerrit-ui/app/elements/change/gr-file-list/gr-file-list.ts
index b8f01de..b78c78f 100644
--- a/polygerrit-ui/app/elements/change/gr-file-list/gr-file-list.ts
+++ b/polygerrit-ui/app/elements/change/gr-file-list/gr-file-list.ts
@@ -50,8 +50,8 @@
 } from '../../../constants/constants';
 import {
   descendedFromClass,
-  getKeyboardEvent,
   isShiftPressed,
+  modifierPressed,
   toggleClass,
 } from '../../../utils/dom-util';
 import {
@@ -78,7 +78,7 @@
 import {GrCursorManager} from '../../shared/gr-cursor-manager/gr-cursor-manager';
 import {PolymerSpliceChange} from '@polymer/polymer/interfaces';
 import {ChangeComments} from '../../diff/gr-comment-api/gr-comment-api';
-import {CustomKeyboardEvent} from '../../../types/events';
+import {IronKeyboardEvent} from '../../../types/events';
 import {ParsedChangeInfo, PatchSetFile} from '../../../types/types';
 import {Timing} from '../../../constants/reporting';
 import {RevisionInfo} from '../../shared/revision-info/revision-info';
@@ -227,9 +227,6 @@
   @property({type: Object, notify: true, observer: '_updateDiffPreferences'})
   diffPrefs?: DiffPreferencesInfo;
 
-  @property({type: Boolean})
-  _showInlineDiffs?: boolean;
-
   @property({type: Number, notify: true})
   numFilesShown: number = DEFAULT_NUM_FILES_SHOWN;
 
@@ -359,14 +356,14 @@
 
   private diffCursor = new GrDiffCursor();
 
+  private readonly shortcuts = appContext.shortcutsService;
+
   constructor() {
     super();
     this.fileCursor.scrollMode = ScrollMode.KEEP_VISIBLE;
     this.fileCursor.cursorTargetClass = 'selected';
     this.fileCursor.focusOnMove = true;
-    this.addEventListener('keydown', e =>
-      this._scopedKeydownHandler(e as unknown as CustomKeyboardEvent)
-    );
+    this.addEventListener('keydown', e => this._scopedKeydownHandler(e));
   }
 
   override connectedCallback() {
@@ -436,13 +433,8 @@
    *
    * Context: Issue 7277
    */
-  _scopedKeydownHandler(e: CustomKeyboardEvent) {
-    if (e.keyCode === 13) {
-      // TODO(TS): e is not an instance of CustomKeyboardEvent.
-      // However, to fix it we should fix keyboard-shortcut-mixin first
-      // The keyboard-shortcut-mixin will be updated in a separate change
-      this._handleOpenFile(e as unknown as CustomKeyboardEvent);
-    }
+  _scopedKeydownHandler(e: KeyboardEvent) {
+    if (e.keyCode === 13) this.handleOpenFile(e);
   }
 
   reload() {
@@ -629,8 +621,6 @@
   }
 
   expandAllDiffs() {
-    this._showInlineDiffs = true;
-
     // Find the list of paths that are in the file list, but not in the
     // expanded list.
     const newFiles: PatchSetFile[] = [];
@@ -646,7 +636,6 @@
   }
 
   collapseAllDiffs() {
-    this._showInlineDiffs = false;
     this._expandedFiles = [];
     this.filesExpanded = this._computeExpandedFiles(
       this._expandedFiles.length,
@@ -892,8 +881,8 @@
     return fileData;
   }
 
-  _handleLeftPane(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e) || this._noDiffsExpanded()) {
+  _handleLeftPane(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e) || this._noDiffsExpanded()) {
       return;
     }
 
@@ -901,8 +890,8 @@
     this.diffCursor.moveLeft();
   }
 
-  _handleRightPane(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e) || this._noDiffsExpanded()) {
+  _handleRightPane(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e) || this._noDiffsExpanded()) {
       return;
     }
 
@@ -910,9 +899,9 @@
     this.diffCursor.moveRight();
   }
 
-  _handleToggleInlineDiff(e: CustomKeyboardEvent) {
+  _handleToggleInlineDiff(e: IronKeyboardEvent) {
     if (
-      this.shouldSuppressKeyboardShortcut(e) ||
+      this.shortcuts.shouldSuppress(e) ||
       this.modifierPressed(e) ||
       e.detail?.keyboardEvent?.repeat ||
       this.fileCursor.index === -1
@@ -924,11 +913,8 @@
     this._toggleFileExpandedByIndex(this.fileCursor.index);
   }
 
-  _handleToggleAllInlineDiffs(e: CustomKeyboardEvent) {
-    if (
-      this.shouldSuppressKeyboardShortcut(e) ||
-      e.detail?.keyboardEvent?.repeat
-    ) {
+  _handleToggleAllInlineDiffs(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e) || e.detail?.keyboardEvent?.repeat) {
       return;
     }
 
@@ -936,8 +922,8 @@
     this._toggleInlineDiffs();
   }
 
-  _handleToggleHideAllCommentThreads(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e) || this.modifierPressed(e)) {
+  _handleToggleHideAllCommentThreads(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e) || this.modifierPressed(e)) {
       return;
     }
 
@@ -945,18 +931,18 @@
     toggleClass(this, 'hideComments');
   }
 
-  _handleCursorNext(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e) || this.modifierPressed(e)) {
+  _handleCursorNext(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e) || this.modifierPressed(e)) {
       return;
     }
 
-    if (this._showInlineDiffs) {
+    if (this.filesExpanded === FilesExpandedState.ALL) {
       e.preventDefault();
       this.diffCursor.moveDown();
       this._displayLine = true;
     } else {
       // Down key
-      if (getKeyboardEvent(e).keyCode === 40) {
+      if (e.detail.keyboardEvent.keyCode === 40) {
         return;
       }
       e.preventDefault();
@@ -965,18 +951,18 @@
     }
   }
 
-  _handleCursorPrev(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e) || this.modifierPressed(e)) {
+  _handleCursorPrev(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e) || this.modifierPressed(e)) {
       return;
     }
 
-    if (this._showInlineDiffs) {
+    if (this.filesExpanded === FilesExpandedState.ALL) {
       e.preventDefault();
       this.diffCursor.moveUp();
       this._displayLine = true;
     } else {
       // Up key
-      if (getKeyboardEvent(e).keyCode === 38) {
+      if (e.detail.keyboardEvent.keyCode === 38) {
         return;
       }
       e.preventDefault();
@@ -985,8 +971,8 @@
     }
   }
 
-  _handleNewComment(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e) || this.modifierPressed(e)) {
+  _handleNewComment(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e) || this.modifierPressed(e)) {
       return;
     }
     e.preventDefault();
@@ -994,9 +980,9 @@
     this.diffCursor.createCommentInPlace();
   }
 
-  _handleOpenLastFile(e: CustomKeyboardEvent) {
+  _handleOpenLastFile(e: IronKeyboardEvent) {
     // Check for meta key to avoid overriding native chrome shortcut.
-    if (this.shouldSuppressKeyboardShortcut(e) || getKeyboardEvent(e).metaKey) {
+    if (this.shortcuts.shouldSuppress(e) || e.detail.keyboardEvent.metaKey) {
       return;
     }
 
@@ -1004,9 +990,9 @@
     this._openSelectedFile(this._files.length - 1);
   }
 
-  _handleOpenFirstFile(e: CustomKeyboardEvent) {
+  _handleOpenFirstFile(e: IronKeyboardEvent) {
     // Check for meta key to avoid overriding native chrome shortcut.
-    if (this.shouldSuppressKeyboardShortcut(e) || getKeyboardEvent(e).metaKey) {
+    if (this.shortcuts.shouldSuppress(e) || e.detail.keyboardEvent.metaKey) {
       return;
     }
 
@@ -1014,13 +1000,18 @@
     this._openSelectedFile(0);
   }
 
-  _handleOpenFile(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e) || this.modifierPressed(e)) {
+  _handleOpenFile(e: IronKeyboardEvent) {
+    if (this.modifierPressed(e)) return;
+    this.handleOpenFile(e.detail.keyboardEvent);
+  }
+
+  handleOpenFile(e: KeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e) || modifierPressed(e)) {
       return;
     }
     e.preventDefault();
 
-    if (this._showInlineDiffs) {
+    if (this.filesExpanded === FilesExpandedState.ALL) {
       this._openCursorFile();
       return;
     }
@@ -1028,9 +1019,9 @@
     this._openSelectedFile();
   }
 
-  _handleNextChunk(e: CustomKeyboardEvent) {
+  _handleNextChunk(e: IronKeyboardEvent) {
     if (
-      this.shouldSuppressKeyboardShortcut(e) ||
+      this.shortcuts.shouldSuppress(e) ||
       (this.modifierPressed(e) && !isShiftPressed(e)) ||
       this._noDiffsExpanded()
     ) {
@@ -1045,9 +1036,9 @@
     }
   }
 
-  _handlePrevChunk(e: CustomKeyboardEvent) {
+  _handlePrevChunk(e: IronKeyboardEvent) {
     if (
-      this.shouldSuppressKeyboardShortcut(e) ||
+      this.shortcuts.shouldSuppress(e) ||
       (this.modifierPressed(e) && !isShiftPressed(e)) ||
       this._noDiffsExpanded()
     ) {
@@ -1062,8 +1053,8 @@
     }
   }
 
-  _handleToggleFileReviewed(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e) || this.modifierPressed(e)) {
+  _handleToggleFileReviewed(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e) || this.modifierPressed(e)) {
       return;
     }
 
@@ -1074,8 +1065,8 @@
     this._reviewFile(this._files[this.fileCursor.index].__path);
   }
 
-  _handleToggleLeftPane(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) {
+  _handleToggleLeftPane(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) {
       return;
     }
 
@@ -1086,7 +1077,7 @@
   }
 
   _toggleInlineDiffs() {
-    if (this._showInlineDiffs) {
+    if (this.filesExpanded === FilesExpandedState.ALL) {
       this.collapseAllDiffs();
     } else {
       this.expandAllDiffs();
@@ -1551,8 +1542,8 @@
     return undefined;
   }
 
-  _handleEscKey(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e) || this.modifierPressed(e)) {
+  _handleEscKey(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e) || this.modifierPressed(e)) {
       return;
     }
     e.preventDefault();
diff --git a/polygerrit-ui/app/elements/change/gr-file-list/gr-file-list_html.ts b/polygerrit-ui/app/elements/change/gr-file-list/gr-file-list_html.ts
index 35f01d8..f7be36b 100644
--- a/polygerrit-ui/app/elements/change/gr-file-list/gr-file-list_html.ts
+++ b/polygerrit-ui/app/elements/change/gr-file-list/gr-file-list_html.ts
@@ -256,9 +256,7 @@
       display: inline-block;
       visibility: hidden;
       vertical-align: bottom;
-      --gr-button: {
-        padding: 0px;
-      }
+      --gr-button-padding: 0px;
     }
     .row:focus-within gr-copy-clipboard,
     .row:hover gr-copy-clipboard {
diff --git a/polygerrit-ui/app/elements/change/gr-file-list/gr-file-list_test.js b/polygerrit-ui/app/elements/change/gr-file-list/gr-file-list_test.js
index 4acf245..f4064da 100644
--- a/polygerrit-ui/app/elements/change/gr-file-list/gr-file-list_test.js
+++ b/polygerrit-ui/app/elements/change/gr-file-list/gr-file-list_test.js
@@ -27,7 +27,6 @@
 import {runA11yAudit} from '../../../test/a11y-test-utils.js';
 import {html} from '@polymer/polymer/lib/utils/html-tag.js';
 import {
-  TestKeyboardShortcutBinder,
   stubRestApi,
   spyRestApi,
   listenOnce,
@@ -35,7 +34,6 @@
   query,
 } from '../../../test/test-utils.js';
 import {EditPatchSetNum} from '../../../types/common.js';
-import {Shortcut} from '../../../mixins/keyboard-shortcut-mixin/keyboard-shortcut-mixin.js';
 import {createCommentThreads} from '../../../utils/comment-util.js';
 import {
   createChange,
@@ -68,30 +66,6 @@
 
   let saveStub;
 
-  suiteSetup(() => {
-    const kb = TestKeyboardShortcutBinder.push();
-    kb.bindShortcut(Shortcut.LEFT_PANE, 'shift+left');
-    kb.bindShortcut(Shortcut.RIGHT_PANE, 'shift+right');
-    kb.bindShortcut(Shortcut.TOGGLE_INLINE_DIFF, 'i:keyup');
-    kb.bindShortcut(Shortcut.TOGGLE_ALL_INLINE_DIFFS, 'shift+i:keyup');
-    kb.bindShortcut(Shortcut.CURSOR_NEXT_FILE, 'j', 'down');
-    kb.bindShortcut(Shortcut.CURSOR_PREV_FILE, 'k', 'up');
-    kb.bindShortcut(Shortcut.NEXT_LINE, 'j', 'down');
-    kb.bindShortcut(Shortcut.PREV_LINE, 'k', 'up');
-    kb.bindShortcut(Shortcut.NEW_COMMENT, 'c');
-    kb.bindShortcut(Shortcut.OPEN_LAST_FILE, '[');
-    kb.bindShortcut(Shortcut.OPEN_FIRST_FILE, ']');
-    kb.bindShortcut(Shortcut.OPEN_FILE, 'o');
-    kb.bindShortcut(Shortcut.NEXT_CHUNK, 'n');
-    kb.bindShortcut(Shortcut.PREV_CHUNK, 'p');
-    kb.bindShortcut(Shortcut.TOGGLE_FILE_REVIEWED, 'r');
-    kb.bindShortcut(Shortcut.TOGGLE_LEFT_PANE, 'shift+a');
-  });
-
-  suiteTeardown(() => {
-    TestKeyboardShortcutBinder.pop();
-  });
-
   suite('basic tests', () => {
     setup(async () => {
       stubRestApi('getDiffComments').returns(Promise.resolve({}));
@@ -566,35 +540,36 @@
         assert.equal(element.diffs.length, 0);
         assert.equal(element._expandedFiles.length, 0);
 
-        MockInteractions.keyUpOn(element, 73, null, 'i');
+        MockInteractions.pressAndReleaseKeyOn(element, 73, null, 'i');
         flush();
         assert.equal(element.diffs.length, 1);
         assert.equal(element.diffs[0].path, paths[0]);
         assert.equal(element._expandedFiles.length, 1);
         assert.equal(element._expandedFiles[0].path, paths[0]);
 
-        MockInteractions.keyUpOn(element, 73, null, 'i');
+        MockInteractions.pressAndReleaseKeyOn(element, 73, null, 'i');
         flush();
         assert.equal(element.diffs.length, 0);
         assert.equal(element._expandedFiles.length, 0);
 
         element.fileCursor.setCursorAtIndex(1);
-        MockInteractions.keyUpOn(element, 73, null, 'i');
+        MockInteractions.pressAndReleaseKeyOn(element, 73, null, 'i');
         flush();
         assert.equal(element.diffs.length, 1);
         assert.equal(element.diffs[0].path, paths[1]);
         assert.equal(element._expandedFiles.length, 1);
         assert.equal(element._expandedFiles[0].path, paths[1]);
 
-        MockInteractions.keyUpOn(element, 73, 'shift', 'i');
+        MockInteractions.pressAndReleaseKeyOn(element, 73, 'shift', 'i');
         flush();
         assert.equal(element.diffs.length, paths.length);
         assert.equal(element._expandedFiles.length, paths.length);
         for (const diff of element.diffs) {
           assert.isTrue(element._expandedFiles.some(f => f.path === diff.path));
         }
-
-        MockInteractions.keyUpOn(element, 73, 'shift', 'i');
+        // since _expandedFilesChanged is stubbed
+        element.filesExpanded = FilesExpandedState.ALL;
+        MockInteractions.pressAndReleaseKeyOn(element, 73, 'shift', 'i');
         flush();
         assert.equal(element.diffs.length, 0);
         assert.equal(element._expandedFiles.length, 0);
@@ -609,12 +584,12 @@
         assert.equal(getNumReviewed(), 0);
 
         // Press the review key to toggle it (set the flag).
-        MockInteractions.pressAndReleaseKeyOn(element, 82, null, 'r');
+        MockInteractions.keyUpOn(element, 82, null, 'r');
         flush();
         assert.equal(getNumReviewed(), 1);
 
         // Press the review key to toggle it (clear the flag).
-        MockInteractions.pressAndReleaseKeyOn(element, 82, null, 'r');
+        MockInteractions.keyUpOn(element, 82, null, 'r');
         assert.equal(getNumReviewed(), 0);
       });
 
@@ -622,22 +597,23 @@
         let interact;
 
         setup(() => {
-          sinon.stub(element, 'shouldSuppressKeyboardShortcut')
-              .returns(false);
           sinon.stub(element, 'modifierPressed').returns(false);
           const openCursorStub = sinon.stub(element, '_openCursorFile');
           const openSelectedStub = sinon.stub(element, '_openSelectedFile');
           const expandStub = sinon.stub(element, '_toggleFileExpanded');
 
-          interact = function(opt_payload) {
+          interact = function() {
             openCursorStub.reset();
             openSelectedStub.reset();
             expandStub.reset();
 
-            const e = new CustomEvent('fake-keyboard-event', opt_payload);
-            sinon.stub(e, 'preventDefault');
+            const keyboardEvent = new KeyboardEvent('keydown');
+            const e = new CustomEvent('keydown', {
+              detail: {keyboardEvent, key: 'x'},
+            });
+            sinon.stub(keyboardEvent, 'preventDefault');
             element._handleOpenFile(e);
-            assert.isTrue(e.preventDefault.called);
+            assert.isTrue(keyboardEvent.preventDefault.called);
             const result = {};
             if (openCursorStub.called) {
               result.opened_cursor = true;
@@ -653,17 +629,17 @@
         });
 
         test('open from selected file', () => {
-          element._showInlineDiffs = false;
+          element.filesExpanded = FilesExpandedState.NONE;
           assert.deepEqual(interact(), {opened_selected: true});
         });
 
         test('open from diff cursor', () => {
-          element._showInlineDiffs = true;
+          element.filesExpanded = FilesExpandedState.ALL;
           assert.deepEqual(interact(), {opened_cursor: true});
         });
 
         test('expand when user prefers', () => {
-          element._showInlineDiffs = false;
+          element.filesExpanded = FilesExpandedState.NONE;
           assert.deepEqual(interact(), {opened_selected: true});
           element._userPrefs = {};
           assert.deepEqual(interact(), {opened_selected: true});
@@ -929,14 +905,14 @@
       element._filesByPath = {[path]: {}};
       element.expandAllDiffs();
       flush();
-      assert.isTrue(element._showInlineDiffs);
+      assert.equal(element.filesExpanded, FilesExpandedState.ALL);
       assert.isTrue(reInitStub.calledOnce);
       assert.equal(collapseStub.lastCall.args[0].length, 0);
 
       element.collapseAllDiffs();
       flush();
       assert.equal(element._expandedFiles.length, 0);
-      assert.isFalse(element._showInlineDiffs);
+      assert.equal(element.filesExpanded, FilesExpandedState.NONE);
       assert.isTrue(cursorUpdateStub.calledOnce);
       assert.equal(collapseStub.lastCall.args[0].length, 1);
     });
@@ -1573,7 +1549,7 @@
     });
 
     test('cursor with individually opened files', async () => {
-      MockInteractions.keyUpOn(element, 73, null, 'i');
+      MockInteractions.pressAndReleaseKeyOn(element, 73, null, 'i');
       await flush();
       let diffs = await renderAndGetNewDiffs(0);
       const diffStops = diffs[0].getCursorStops();
@@ -1600,7 +1576,7 @@
       // The file cursor is now at 1.
       assert.equal(element.fileCursor.index, 1);
 
-      MockInteractions.keyUpOn(element, 73, null, 'i');
+      MockInteractions.pressAndReleaseKeyOn(element, 73, null, 'i');
       await flush();
       diffs = await renderAndGetNewDiffs(1);
 
@@ -1615,7 +1591,7 @@
     });
 
     test('cursor with toggle all files', async () => {
-      MockInteractions.keyUpOn(element, 73, 'shift', 'i');
+      MockInteractions.pressAndReleaseKeyOn(element, 73, 'shift', 'i');
       await flush();
 
       const diffs = await renderAndGetNewDiffs(0);
@@ -1662,7 +1638,7 @@
       });
 
       test('n key with some files expanded and no shift key', async () => {
-        MockInteractions.keyUpOn(fileRows[0], 73, null, 'i');
+        MockInteractions.pressAndReleaseKeyOn(fileRows[0], 73, null, 'i');
         await flush();
 
         // Handle N key should return before calling diff cursor functions.
@@ -1676,7 +1652,7 @@
       });
 
       test('n key with some files expanded and shift key', async () => {
-        MockInteractions.keyUpOn(fileRows[0], 73, null, 'i');
+        MockInteractions.pressAndReleaseKeyOn(fileRows[0], 73, null, 'i');
         await flush();
         assert.equal(nextChunkStub.callCount, 0);
 
@@ -1690,7 +1666,7 @@
       });
 
       test('n key without all files expanded and shift key', async () => {
-        MockInteractions.keyUpOn(fileRows[0], 73, 'shift', 'i');
+        MockInteractions.pressAndReleaseKeyOn(fileRows[0], 73, 'shift', 'i');
         await flush();
 
         MockInteractions.pressAndReleaseKeyOn(element, 78, null, 'n');
@@ -1699,11 +1675,11 @@
 
         // This is also called in diffCursor.moveToFirstChunk.
         assert.equal(nextChunkStub.callCount, 1);
-        assert.isTrue(element._showInlineDiffs);
+        assert.equal(element.filesExpanded, FilesExpandedState.ALL);
       });
 
       test('n key without all files expanded and no shift key', async () => {
-        MockInteractions.keyUpOn(fileRows[0], 73, 'shift', 'i');
+        MockInteractions.pressAndReleaseKeyOn(fileRows[0], 73, 'shift', 'i');
         await flush();
 
         MockInteractions.pressAndReleaseKeyOn(element, 78, 'shift', 'n');
@@ -1712,7 +1688,7 @@
 
         // This is also called in diffCursor.moveToFirstChunk.
         assert.equal(nextChunkStub.callCount, 0);
-        assert.isTrue(element._showInlineDiffs);
+        assert.equal(element.filesExpanded, FilesExpandedState.ALL);
       });
     });
 
@@ -1732,12 +1708,13 @@
     });
 
     test('_displayLine', () => {
-      sinon.stub(element, 'shouldSuppressKeyboardShortcut')
-          .callsFake(() => false);
       sinon.stub(element, 'modifierPressed')
           .callsFake(() => false);
-      element._showInlineDiffs = true;
-      const mockEvent = {preventDefault() {}};
+      element.filesExpanded = FilesExpandedState.ALL;
+      const mockEvent = {
+        preventDefault() {},
+        composedPath() { return []; },
+      };
 
       element._displayLine = false;
       element._handleCursorNext(mockEvent);
@@ -1758,13 +1735,13 @@
         const saveReviewStub = sinon.stub(element, '_saveReviewedState');
 
         element.editMode = false;
-        MockInteractions.pressAndReleaseKeyOn(element, 82, null, 'r');
+        MockInteractions.keyUpOn(element, 82, null, 'r');
         assert.isTrue(saveReviewStub.calledOnce);
 
         element.editMode = true;
         await flush();
 
-        MockInteractions.pressAndReleaseKeyOn(element, 82, null, 'r');
+        MockInteractions.keyUpOn(element, 82, null, 'r');
         assert.isTrue(saveReviewStub.calledOnce);
       });
 
diff --git a/polygerrit-ui/app/elements/change/gr-label-score-row/gr-label-score-row_html.ts b/polygerrit-ui/app/elements/change/gr-label-score-row/gr-label-score-row_html.ts
index 421cd6e..0af2f36 100644
--- a/polygerrit-ui/app/elements/change/gr-label-score-row/gr-label-score-row_html.ts
+++ b/polygerrit-ui/app/elements/change/gr-label-score-row/gr-label-score-row_html.ts
@@ -126,7 +126,7 @@
         >
           <gr-button
             role="radio"
-            vote="[[_computeVoteAttribute(value, index, _items.length)]]"
+            vote$="[[_computeVoteAttribute(value, index, _items.length)]]"
             voteChip
           >
             [[value]]
diff --git a/polygerrit-ui/app/elements/change/gr-message/gr-message_html.ts b/polygerrit-ui/app/elements/change/gr-message/gr-message_html.ts
index c9680ef..7f3e9de 100644
--- a/polygerrit-ui/app/elements/change/gr-message/gr-message_html.ts
+++ b/polygerrit-ui/app/elements/change/gr-message/gr-message_html.ts
@@ -132,7 +132,7 @@
     }
     .dateContainer .patchsetDiffButton {
       margin-right: var(--spacing-m);
-      --padding: 0 var(--spacing-m);
+      --gr-button-padding: 0 var(--spacing-m);
     }
     span.date {
       color: var(--deemphasized-text-color);
diff --git a/polygerrit-ui/app/elements/change/gr-messages-list/gr-messages-list.ts b/polygerrit-ui/app/elements/change/gr-messages-list/gr-messages-list.ts
index fdd7c79..cd79bba 100644
--- a/polygerrit-ui/app/elements/change/gr-messages-list/gr-messages-list.ts
+++ b/polygerrit-ui/app/elements/change/gr-messages-list/gr-messages-list.ts
@@ -257,6 +257,8 @@
 
   private readonly reporting = appContext.reportingService;
 
+  private readonly shortcuts = appContext.shortcutsService;
+
   scrollToMessage(messageID: string) {
     const selector = `[data-message-id="${messageID}"]`;
     const el = this.shadowRoot!.querySelector(selector) as
@@ -384,13 +386,13 @@
 
   _computeExpandAllTitle(_expandAllState?: string) {
     if (_expandAllState === ExpandAllState.COLLAPSE_ALL) {
-      return this.createTitle(
+      return this.shortcuts.createTitle(
         Shortcut.COLLAPSE_ALL_MESSAGES,
         ShortcutSection.ACTIONS
       );
     }
     if (_expandAllState === ExpandAllState.EXPAND_ALL) {
-      return this.createTitle(
+      return this.shortcuts.createTitle(
         Shortcut.EXPAND_ALL_MESSAGES,
         ShortcutSection.ACTIONS
       );
diff --git a/polygerrit-ui/app/elements/change/gr-related-changes-list/gr-related-change.ts b/polygerrit-ui/app/elements/change/gr-related-changes-list/gr-related-change.ts
index d34600e..e4703df 100644
--- a/polygerrit-ui/app/elements/change/gr-related-changes-list/gr-related-change.ts
+++ b/polygerrit-ui/app/elements/change/gr-related-changes-list/gr-related-change.ts
@@ -24,6 +24,7 @@
 } from '../../../types/common';
 import {ChangeStatus} from '../../../constants/constants';
 import {isChangeInfo} from '../../../utils/change-util';
+import {ifDefined} from 'lit/directives/if-defined';
 
 @customElement('gr-related-change')
 export class GrRelatedChange extends LitElement {
@@ -109,7 +110,7 @@
     const linkClass = this._computeLinkClass(change);
     return html`
       <div class="changeContainer">
-        <a href="${this.href}" class="${linkClass}"><slot></slot></a>
+        <a href="${ifDefined(this.href)}" class="${linkClass}"><slot></slot></a>
         ${this.showSubmittableCheck
           ? html`<span
               tabindex="-1"
diff --git a/polygerrit-ui/app/elements/change/gr-related-changes-list/gr-related-changes-list.ts b/polygerrit-ui/app/elements/change/gr-related-changes-list/gr-related-changes-list.ts
index 74f20f2..bce4024 100644
--- a/polygerrit-ui/app/elements/change/gr-related-changes-list/gr-related-changes-list.ts
+++ b/polygerrit-ui/app/elements/change/gr-related-changes-list/gr-related-changes-list.ts
@@ -40,6 +40,7 @@
   isChangeInfo,
 } from '../../../utils/change-util';
 import {Interaction} from '../../../constants/reporting';
+import {fontStyles} from '../../../styles/gr-font-styles';
 
 /** What is the maximum number of shown changes in collapsed list? */
 const DEFALT_NUM_CHANGES_WHEN_COLLAPSED = 3;
@@ -686,9 +687,9 @@
   static override get styles() {
     return [
       sharedStyles,
+      fontStyles,
       css`
         .title {
-          font-weight: var(--font-weight-bold);
           color: var(--deemphasized-text-color);
           padding-left: var(--metadata-horizontal-padding);
         }
@@ -720,7 +721,7 @@
   }
 
   override render() {
-    const title = html`<h4 class="title">${this.title}</h4>`;
+    const title = html`<h3 class="title heading-3">${this.title}</h3>`;
 
     const collapsible = this.length > this.numChangesWhenCollapsed;
     this.collapsed = !this.showAll && collapsible;
diff --git a/polygerrit-ui/app/elements/change/gr-reply-dialog/gr-reply-dialog_html.ts b/polygerrit-ui/app/elements/change/gr-reply-dialog/gr-reply-dialog_html.ts
index 1973fe6..0beb91c 100644
--- a/polygerrit-ui/app/elements/change/gr-reply-dialog/gr-reply-dialog_html.ts
+++ b/polygerrit-ui/app/elements/change/gr-reply-dialog/gr-reply-dialog_html.ts
@@ -177,7 +177,7 @@
     }
     .attention .edit-attention-button {
       vertical-align: top;
-      --padding: 0px 4px;
+      --gr-button-padding: 0px 4px;
     }
     .attention .edit-attention-button iron-icon {
       color: inherit;
diff --git a/polygerrit-ui/app/elements/change/gr-reviewer-list/gr-reviewer-list_html.ts b/polygerrit-ui/app/elements/change/gr-reviewer-list/gr-reviewer-list_html.ts
index b081be7..d115899 100644
--- a/polygerrit-ui/app/elements/change/gr-reviewer-list/gr-reviewer-list_html.ts
+++ b/polygerrit-ui/app/elements/change/gr-reviewer-list/gr-reviewer-list_html.ts
@@ -42,15 +42,13 @@
       display: inline-block;
     }
     gr-button.addReviewer {
-      --padding: 1px 4px;
+      --gr-button-padding: 1px 0px;
       vertical-align: top;
       top: 1px;
     }
     gr-button {
       line-height: var(--line-height-normal);
-      --gr-button: {
-        padding: 0px 0px;
-      }
+      --gr-button-padding: 0px;
     }
     gr-account-chip {
       line-height: var(--line-height-normal);
diff --git a/polygerrit-ui/app/elements/change/gr-submit-requirement-hovercard/gr-submit-requirement-hovercard_html.ts b/polygerrit-ui/app/elements/change/gr-submit-requirement-hovercard/gr-submit-requirement-hovercard_html.ts
index 192a812..b7b4d9c 100644
--- a/polygerrit-ui/app/elements/change/gr-submit-requirement-hovercard/gr-submit-requirement-hovercard_html.ts
+++ b/polygerrit-ui/app/elements/change/gr-submit-requirement-hovercard/gr-submit-requirement-hovercard_html.ts
@@ -51,13 +51,13 @@
     div.section {
       margin: 0 var(--spacing-xl) var(--spacing-m) var(--spacing-xl);
       display: flex;
+      align-items: center;
     }
     div.sectionIcon {
       flex: 0 0 30px;
     }
     div.sectionIcon iron-icon {
       position: relative;
-      top: 2px;
       width: 20px;
       height: 20px;
     }
diff --git a/polygerrit-ui/app/elements/change/gr-submit-requirements/gr-submit-requirements.ts b/polygerrit-ui/app/elements/change/gr-submit-requirements/gr-submit-requirements.ts
index fd85117..19bc388 100644
--- a/polygerrit-ui/app/elements/change/gr-submit-requirements/gr-submit-requirements.ts
+++ b/polygerrit-ui/app/elements/change/gr-submit-requirements/gr-submit-requirements.ts
@@ -40,6 +40,7 @@
 } from '../../../services/checks/checks-model';
 import {getResultsOf, hasResultsOf} from '../../../services/checks/checks-util';
 import {Category} from '../../../api/checks';
+import '../../shared/gr-vote-chip/gr-vote-chip';
 
 @customElement('gr-submit-requirements')
 export class GrSubmitRequirements extends LitElement {
@@ -60,7 +61,6 @@
       fontStyles,
       css`
         .metadata-title {
-          font-weight: var(--font-weight-bold);
           color: var(--deemphasized-text-color);
           padding-left: var(--metadata-horizontal-padding);
           margin: 0 0 var(--spacing-s);
@@ -128,12 +128,12 @@
     const submit_requirements = (this.change?.submit_requirements ?? []).filter(
       req => req.status !== SubmitRequirementStatus.NOT_APPLICABLE
     );
-    return html` <h2
+    return html` <h3
         class="metadata-title heading-3"
         id="submit-requirements-caption"
       >
         Submit Requirements
-      </h2>
+      </h3>
       <table class="requirements" aria-labelledby="submit-requirements-caption">
         <thead hidden>
           <tr>
@@ -172,7 +172,7 @@
             .requirement="${requirement}"
             .change="${this.change}"
             .account="${this.account}"
-            .mutable="${this.mutable}"
+            .mutable="${this.mutable ?? false}"
           ></gr-submit-requirement-hovercard>
         `
       )}
@@ -268,7 +268,7 @@
             <gr-label-info
               .change="${this.change}"
               .account="${this.account}"
-              .mutable="${this.mutable}"
+              .mutable="${this.mutable ?? false}"
               label="${label}"
               .labelInfo="${labels[label]}"
             ></gr-label-info>`
diff --git a/polygerrit-ui/app/elements/change/gr-thread-list/gr-thread-list_html.ts b/polygerrit-ui/app/elements/change/gr-thread-list/gr-thread-list_html.ts
index 6ed5a2c..3eb28c9 100644
--- a/polygerrit-ui/app/elements/change/gr-thread-list/gr-thread-list_html.ts
+++ b/polygerrit-ui/app/elements/change/gr-thread-list/gr-thread-list_html.ts
@@ -51,11 +51,8 @@
       margin-right: var(--spacing-s);
     }
     gr-dropdown-list {
-      --trigger-style: {
-        color: var(--primary-text-color);
-        text-transform: none;
-        font-family: var(--font-family);
-      }
+      --trigger-style-text-color: var(--primary-text-color);
+      --trigger-style-font-family: var(--font-family);
     }
     .filter-text, .sort-text, .author-text {
       margin-right: var(--spacing-s);
diff --git a/polygerrit-ui/app/elements/checks/gr-checks-action.ts b/polygerrit-ui/app/elements/checks/gr-checks-action.ts
index aed07e0..859fd33 100644
--- a/polygerrit-ui/app/elements/checks/gr-checks-action.ts
+++ b/polygerrit-ui/app/elements/checks/gr-checks-action.ts
@@ -22,10 +22,10 @@
 
 @customElement('gr-checks-action')
 export class GrChecksAction extends LitElement {
-  @property()
+  @property({type: Object})
   action!: Action;
 
-  @property()
+  @property({type: Object})
   eventTarget: HTMLElement | null = null;
 
   private checksService = appContext.checksService;
@@ -43,7 +43,7 @@
           white-space: nowrap;
         }
         gr-button {
-          --padding: var(--spacing-s) var(--spacing-m);
+          --gr-button-padding: var(--spacing-s) var(--spacing-m);
         }
         paper-tooltip {
           text-transform: none;
@@ -72,7 +72,7 @@
   private renderTooltip() {
     if (!this.action.tooltip) return;
     return html`
-      <paper-tooltip offset="5" fit-to-visible-bounds="true">
+      <paper-tooltip offset="5" fit-to-visible-bounds>
         ${this.action.tooltip}
       </paper-tooltip>
     `;
diff --git a/polygerrit-ui/app/elements/checks/gr-checks-attempt.ts b/polygerrit-ui/app/elements/checks/gr-checks-attempt.ts
index b4d87ae..69152b2 100644
--- a/polygerrit-ui/app/elements/checks/gr-checks-attempt.ts
+++ b/polygerrit-ui/app/elements/checks/gr-checks-attempt.ts
@@ -21,7 +21,7 @@
 
 @customElement('gr-checks-attempt')
 class GrChecksAttempt extends LitElement {
-  @property()
+  @property({attribute: false})
   run?: CheckRun;
 
   static override get styles() {
diff --git a/polygerrit-ui/app/elements/checks/gr-checks-results.ts b/polygerrit-ui/app/elements/checks/gr-checks-results.ts
index 68c7957..48ccf2c 100644
--- a/polygerrit-ui/app/elements/checks/gr-checks-results.ts
+++ b/polygerrit-ui/app/elements/checks/gr-checks-results.ts
@@ -20,7 +20,9 @@
 import {LitElement, css, html, PropertyValues, TemplateResult} from 'lit';
 import {customElement, property, query, state} from 'lit/decorators';
 import './gr-checks-action';
+import './gr-hovercard-run';
 import '@polymer/paper-tooltip/paper-tooltip';
+import '@polymer/iron-icon/iron-icon';
 import {
   Action,
   Category,
@@ -46,7 +48,6 @@
   iconForLink,
   isCategory,
   otherPrimaryLinks,
-  primaryRunAction,
   secondaryLinks,
   tooltipForLink,
 } from '../../services/checks/checks-util';
@@ -80,19 +81,19 @@
   @query('td.nameCol div.name')
   nameEl?: HTMLElement;
 
-  @property()
+  @property({attribute: false})
   result?: RunResult;
 
-  @property()
+  @state()
   isExpanded = false;
 
   @property({type: Boolean, reflect: true})
   isExpandable = false;
 
-  @property()
+  @state()
   shouldRender = false;
 
-  @property()
+  @state()
   labels?: LabelNameToInfoMap;
 
   private checksService = appContext.checksService;
@@ -323,7 +324,6 @@
               ${this.result.checkName}
             </div>
             <div class="space"></div>
-            ${this.renderPrimaryRunAction()}
           </div>
         </td>
         <td class="summaryCol">
@@ -346,7 +346,7 @@
             role="switch"
             tabindex="0"
             ?hidden="${!this.isExpandable}"
-            ?aria-checked="${this.isExpanded}"
+            aria-checked="${this.isExpanded ? 'true' : 'false'}"
             aria-label="${this.isExpanded
               ? 'Collapse result row'
               : 'Expand result row'}"
@@ -366,13 +366,6 @@
     `;
   }
 
-  private renderPrimaryRunAction() {
-    if (!this.result) return;
-    const action = primaryRunAction(this.result);
-    if (!action) return;
-    return html`<gr-checks-action .action="${action}"></gr-checks-action>`;
-  }
-
   private renderExpanded() {
     if (!this.isExpanded) return;
     return html`<gr-result-expanded
@@ -427,7 +420,7 @@
     return html`
       <div class="label ${status}">
         <span>${label} ${valueStr}</span>
-        <paper-tooltip offset="5" fit-to-visible-bounds="true">
+        <paper-tooltip offset="5" ?fitToVisibleBounds="${true}">
           The check result has (probably) influenced this label vote.
         </paper-tooltip>
       </div>
@@ -524,7 +517,7 @@
   renderTag(tag: Tag) {
     return html`<div class="tag ${tag.color}">
       <span>${tag.name}</span>
-      <paper-tooltip offset="5" fit-to-visible-bounds="true">
+      <paper-tooltip offset="5" ?fitToVisibleBounds="${true}">
         ${tag.tooltip ?? 'A category tag for this check result'}
       </paper-tooltip>
     </div>`;
@@ -533,10 +526,10 @@
 
 @customElement('gr-result-expanded')
 class GrResultExpanded extends LitElement {
-  @property()
+  @property({attribute: false})
   result?: RunResult;
 
-  @property()
+  @state()
   repoConfig?: ConfigInfo;
 
   private changeService = appContext.changeService;
@@ -680,36 +673,36 @@
   filterRegExp = new RegExp('');
 
   /** All runs. Shown should only the selected/filtered ones. */
-  @property()
+  @property({attribute: false})
   runs: CheckRun[] = [];
 
   /**
    * Check names of runs that are selected in the runs panel. When this array
    * is empty, then no run is selected and all runs should be shown.
    */
-  @property()
+  @property({attribute: false})
   selectedRuns: string[] = [];
 
-  @property()
+  @state()
   actions: Action[] = [];
 
-  @property()
+  @state()
   links: Link[] = [];
 
-  @property()
+  @property({attribute: false})
   tabState?: ChecksTabState;
 
-  @property()
+  @state()
   someProvidersAreLoading = false;
 
-  @property()
+  @state()
   checksPatchsetNumber: PatchSetNumber | undefined = undefined;
 
-  @property()
+  @state()
   latestPatchsetNumber: PatchSetNumber | undefined = undefined;
 
   /** Maps checkName to selected attempt number. `undefined` means `latest`. */
-  @property()
+  @property({attribute: false})
   selectedAttempts: Map<string, number | undefined> = new Map<
     string,
     number | undefined
@@ -816,6 +809,7 @@
         }
         .headerTopRow .right .goToLatest gr-button {
           margin-right: var(--spacing-m);
+          --gr-button-padding: var(--spacing-s) var(--spacing-m);
         }
         .headerBottomRow iron-icon {
           color: var(--link-color);
@@ -975,23 +969,12 @@
   }
 
   override render() {
-    // To pass CSS mixins for @apply to Polymer components, they need to appear
-    // in <style> inside the template.
-    /* eslint-disable lit/prefer-static-styles */
-    const style = html`<style>
-      .headerTopRow .right .goToLatest gr-button {
-        --gr-button: {
-          padding: var(--spacing-s) var(--spacing-m);
-          text-transform: none;
-        }
-      }
-    </style>`;
-    const headerClasses = classMap({
+    const headerClasses = {
       header: true,
       notLatest: !!this.checksPatchsetNumber,
-    });
-    return html`${style}
-      <div class="${headerClasses}">
+    };
+    return html`
+      <div class="${classMap(headerClasses)}">
         <div class="headerTopRow">
           <div class="left">
             <h2 class="heading-2">Results</h2>
@@ -1007,7 +990,9 @@
               >
             </div>
             <gr-dropdown-list
-              value="${this.checksPatchsetNumber ?? this.latestPatchsetNumber}"
+              value="${this.checksPatchsetNumber ??
+              this.latestPatchsetNumber ??
+              0}"
               .items="${this.createPatchsetDropdownItems()}"
               @value-change="${this.onPatchsetSelected}"
             ></gr-dropdown-list>
@@ -1023,7 +1008,8 @@
         ${this.renderSection(Category.WARNING)}
         ${this.renderSection(Category.INFO)}
         ${this.renderSection(Category.SUCCESS)}
-      </div>`;
+      </div>
+    `;
   }
 
   private renderLinksAndActions() {
@@ -1295,9 +1281,9 @@
           ${repeat(
             filtered,
             result => result.internalResultId,
-            result => html`
+            (result?: RunResult) => html`
               <gr-result-row
-                class="${charsOnly(result.checkName)}"
+                class="${charsOnly(result!.checkName)}"
                 .result="${result}"
               ></gr-result-row>
             `
diff --git a/polygerrit-ui/app/elements/checks/gr-checks-runs.ts b/polygerrit-ui/app/elements/checks/gr-checks-runs.ts
index 76fa353..e1d8932 100644
--- a/polygerrit-ui/app/elements/checks/gr-checks-runs.ts
+++ b/polygerrit-ui/app/elements/checks/gr-checks-runs.ts
@@ -14,6 +14,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+import '@polymer/iron-icon/iron-icon';
 import {classMap} from 'lit/directives/class-map';
 import './gr-hovercard-run';
 import {css, html, LitElement, nothing, PropertyValues} from 'lit';
@@ -182,28 +183,24 @@
   @query('.chip')
   chipElement?: HTMLElement;
 
-  @property()
+  @property({attribute: false})
   run!: CheckRun;
 
-  @property()
+  @property({attribute: false})
   selected = false;
 
-  @property()
+  @property({attribute: false})
   selectedAttempt?: number;
 
-  @property()
+  @property({attribute: false})
   deselected = false;
 
-  @property()
+  @state()
   shouldRender = false;
 
   override firstUpdated() {
     assertIsDefined(this.chipElement, 'chip element');
-    whenVisible(
-      this.chipElement,
-      () => this.setAttribute('shouldRender', 'true'),
-      200
-    );
+    whenVisible(this.chipElement, () => (this.shouldRender = true), 200);
   }
 
   protected override updated(changedProperties: PropertyValues) {
@@ -365,29 +362,29 @@
   @state()
   filterRegExp = new RegExp('');
 
-  @property()
+  @property({attribute: false})
   runs: CheckRun[] = [];
 
   @property({type: Boolean, reflect: true})
   collapsed = false;
 
-  @property()
+  @property({attribute: false})
   selectedRuns: string[] = [];
 
   /** Maps checkName to selected attempt number. `undefined` means `latest`. */
-  @property()
+  @property({attribute: false})
   selectedAttempts: Map<string, number | undefined> = new Map<
     string,
     number | undefined
   >();
 
-  @property()
+  @property({attribute: false})
   tabState?: ChecksTabState;
 
-  @property()
+  @state()
   errorMessages: ErrorMessages = {};
 
-  @property()
+  @state()
   loginCallback?: () => void;
 
   private isSectionExpanded = new Map<RunStatus, boolean>();
@@ -426,11 +423,11 @@
           flex-grow: 1;
         }
         .title gr-button {
-          --padding: var(--spacing-s) var(--spacing-m);
+          --gr-button-padding: var(--spacing-s) var(--spacing-m);
           white-space: nowrap;
         }
         .title gr-button.expandButton {
-          --padding: var(--spacing-xs) var(--spacing-s);
+          --gr-button-padding: var(--spacing-xs) var(--spacing-s);
         }
         :host(:not([collapsed])) .expandButton {
           margin-right: calc(0px - var(--spacing-m));
@@ -630,7 +627,7 @@
           link
           class="expandButton"
           role="switch"
-          ?aria-checked="${this.collapsed}"
+          aria-checked="${this.collapsed ? 'true' : 'false'}"
           aria-label="${this.collapsed
             ? 'Expand runs panel'
             : 'Collapse runs panel'}"
diff --git a/polygerrit-ui/app/elements/checks/gr-checks-tab.ts b/polygerrit-ui/app/elements/checks/gr-checks-tab.ts
index 688667a..ed6117a 100644
--- a/polygerrit-ui/app/elements/checks/gr-checks-tab.ts
+++ b/polygerrit-ui/app/elements/checks/gr-checks-tab.ts
@@ -40,22 +40,22 @@
  */
 @customElement('gr-checks-tab')
 export class GrChecksTab extends LitElement {
-  @property()
+  @state()
   runs: CheckRun[] = [];
 
-  @property()
+  @state()
   results: CheckResult[] = [];
 
-  @property()
+  @property({type: Object})
   tabState?: ChecksTabState;
 
-  @property()
+  @state()
   checksPatchsetNumber: PatchSetNumber | undefined = undefined;
 
-  @property()
+  @state()
   latestPatchsetNumber: PatchSetNumber | undefined = undefined;
 
-  @property()
+  @state()
   changeNum: NumericChangeId | undefined = undefined;
 
   @state()
diff --git a/polygerrit-ui/app/elements/core/gr-account-dropdown/gr-account-dropdown.ts b/polygerrit-ui/app/elements/core/gr-account-dropdown/gr-account-dropdown.ts
index c2066d7..eb55177 100644
--- a/polygerrit-ui/app/elements/core/gr-account-dropdown/gr-account-dropdown.ts
+++ b/polygerrit-ui/app/elements/core/gr-account-dropdown/gr-account-dropdown.ts
@@ -82,6 +82,7 @@
       css`
         gr-dropdown {
           padding: 0 var(--spacing-m);
+          --gr-button-text-color: var(--header-text-color);
         }
         gr-avatar {
           height: 2em;
@@ -99,9 +100,6 @@
     const customStyle = html`
       <style>
         gr-dropdown {
-          --gr-button: {
-            color: var(--header-text-color);
-          }
           --gr-dropdown-item: {
             color: var(--primary-text-color);
           }
diff --git a/polygerrit-ui/app/elements/core/gr-keyboard-shortcuts-dialog/gr-keyboard-shortcuts-dialog.ts b/polygerrit-ui/app/elements/core/gr-keyboard-shortcuts-dialog/gr-keyboard-shortcuts-dialog.ts
index 0b191f1..541d877 100644
--- a/polygerrit-ui/app/elements/core/gr-keyboard-shortcuts-dialog/gr-keyboard-shortcuts-dialog.ts
+++ b/polygerrit-ui/app/elements/core/gr-keyboard-shortcuts-dialog/gr-keyboard-shortcuts-dialog.ts
@@ -27,6 +27,7 @@
   SectionView,
 } from '../../../mixins/keyboard-shortcut-mixin/keyboard-shortcut-mixin';
 import {property, customElement} from '@polymer/decorators';
+import {appContext} from '../../../services/app-context';
 
 declare global {
   interface HTMLElementTagNameMap {
@@ -60,13 +61,14 @@
   @property({type: Array})
   _right?: SectionShortcut[];
 
-  private keyboardShortcutDirectoryListener: ShortcutListener;
+  private readonly shortcutListener: ShortcutListener;
+
+  private readonly shortcuts = appContext.shortcutsService;
 
   constructor() {
     super();
-    this.keyboardShortcutDirectoryListener = (
-      d?: Map<ShortcutSection, SectionView>
-    ) => this._onDirectoryUpdated(d);
+    this.shortcutListener = (d?: Map<ShortcutSection, SectionView>) =>
+      this._onDirectoryUpdated(d);
   }
 
   override ready() {
@@ -76,15 +78,11 @@
 
   override connectedCallback() {
     super.connectedCallback();
-    this.addKeyboardShortcutDirectoryListener(
-      this.keyboardShortcutDirectoryListener
-    );
+    this.shortcuts.addListener(this.shortcutListener);
   }
 
   override disconnectedCallback() {
-    this.removeKeyboardShortcutDirectoryListener(
-      this.keyboardShortcutDirectoryListener
-    );
+    this.shortcuts.removeListener(this.shortcutListener);
     super.disconnectedCallback();
   }
 
diff --git a/polygerrit-ui/app/elements/core/gr-router/gr-router.ts b/polygerrit-ui/app/elements/core/gr-router/gr-router.ts
index 8e70eb9..f0cff85 100644
--- a/polygerrit-ui/app/elements/core/gr-router/gr-router.ts
+++ b/polygerrit-ui/app/elements/core/gr-router/gr-router.ts
@@ -178,7 +178,7 @@
   CHANGE_ID_QUERY: /^\/id\/(I[0-9a-f]{40})$/,
 
   // Matches /c/<changeNum>/[*][/].
-  CHANGE_LEGACY: /^\/c\/(\d+)\/(.*)$/,
+  CHANGE_LEGACY: /^\/c\/(\d+)\/?(.*)$/,
   CHANGE_NUMBER_LEGACY: /^\/(\d+)\/?/,
 
   // Matches
diff --git a/polygerrit-ui/app/elements/core/gr-search-bar/gr-search-bar.ts b/polygerrit-ui/app/elements/core/gr-search-bar/gr-search-bar.ts
index 240bb22..78c1ebd 100644
--- a/polygerrit-ui/app/elements/core/gr-search-bar/gr-search-bar.ts
+++ b/polygerrit-ui/app/elements/core/gr-search-bar/gr-search-bar.ts
@@ -31,10 +31,9 @@
   GrAutocomplete,
 } from '../../shared/gr-autocomplete/gr-autocomplete';
 import {getDocsBaseUrl} from '../../../utils/url-util';
-import {CustomKeyboardEvent} from '../../../types/events';
+import {IronKeyboardEvent} from '../../../types/events';
 import {MergeabilityComputationBehavior} from '../../../constants/constants';
 import {appContext} from '../../../services/app-context';
-import {getKeyboardEvent} from '../../../utils/dom-util';
 
 // Possible static search options for auto complete, without negations.
 const SEARCH_OPERATORS: ReadonlyArray<string> = [
@@ -199,6 +198,8 @@
 
   private readonly restApiService = appContext.restApiService;
 
+  private readonly shortcuts = appContext.shortcutsService;
+
   constructor() {
     super();
     this.query = (input: string) => this._getSearchSuggestions(input);
@@ -396,10 +397,10 @@
     });
   }
 
-  _handleSearch(e: CustomKeyboardEvent) {
-    const keyboardEvent = getKeyboardEvent(e);
+  _handleSearch(e: IronKeyboardEvent) {
+    const keyboardEvent = e.detail.keyboardEvent;
     if (
-      this.shouldSuppressKeyboardShortcut(e) ||
+      this.shortcuts.shouldSuppress(e) ||
       (this.modifierPressed(e) && !keyboardEvent.shiftKey)
     ) {
       return;
diff --git a/polygerrit-ui/app/elements/core/gr-search-bar/gr-search-bar_test.ts b/polygerrit-ui/app/elements/core/gr-search-bar/gr-search-bar_test.ts
index b5b0124..b6d0579 100644
--- a/polygerrit-ui/app/elements/core/gr-search-bar/gr-search-bar_test.ts
+++ b/polygerrit-ui/app/elements/core/gr-search-bar/gr-search-bar_test.ts
@@ -19,12 +19,7 @@
 import './gr-search-bar';
 import '../../../scripts/util';
 import {GrSearchBar} from './gr-search-bar';
-import {
-  TestKeyboardShortcutBinder,
-  stubRestApi,
-  mockPromise,
-} from '../../../test/test-utils';
-import {Shortcut} from '../../../mixins/keyboard-shortcut-mixin/keyboard-shortcut-mixin';
+import {stubRestApi, mockPromise} from '../../../test/test-utils';
 import {_testOnly_clearDocsBaseUrlCache} from '../../../utils/url-util';
 import * as MockInteractions from '@polymer/iron-test-helpers/mock-interactions';
 import {
@@ -39,15 +34,6 @@
 suite('gr-search-bar tests', () => {
   let element: GrSearchBar;
 
-  suiteSetup(() => {
-    const kb = TestKeyboardShortcutBinder.push();
-    kb.bindShortcut(Shortcut.SEARCH, '/');
-  });
-
-  suiteTeardown(() => {
-    TestKeyboardShortcutBinder.pop();
-  });
-
   setup(async () => {
     element = basicFixture.instantiate();
     await flush();
diff --git a/polygerrit-ui/app/elements/diff/gr-diff-highlight/gr-annotation.ts b/polygerrit-ui/app/elements/diff/gr-diff-highlight/gr-annotation.ts
index 5e81871..79e7dbc 100644
--- a/polygerrit-ui/app/elements/diff/gr-diff-highlight/gr-annotation.ts
+++ b/polygerrit-ui/app/elements/diff/gr-diff-highlight/gr-annotation.ts
@@ -134,7 +134,7 @@
 
       if (node instanceof Text) {
         this._annotateText(node, offset, subLength, cssClass);
-      } else if (node instanceof HTMLElement) {
+      } else if (node instanceof Element) {
         this.annotateElement(node, offset, subLength, cssClass);
       }
 
diff --git a/polygerrit-ui/app/elements/diff/gr-diff-host/gr-diff-host.ts b/polygerrit-ui/app/elements/diff/gr-diff-host/gr-diff-host.ts
index 463163c..4641897 100644
--- a/polygerrit-ui/app/elements/diff/gr-diff-host/gr-diff-host.ts
+++ b/polygerrit-ui/app/elements/diff/gr-diff-host/gr-diff-host.ts
@@ -223,9 +223,6 @@
   @property({type: Boolean})
   _loggedIn = false;
 
-  @property({type: Boolean})
-  disableTokenHighlighting = false;
-
   @property({type: String})
   _errorMessage: string | null = null;
 
@@ -303,11 +300,6 @@
     this.addEventListener('diff-context-expanded', event =>
       this._handleDiffContextExpanded(event)
     );
-    appContext.restApiService.getPreferences().then(prefs => {
-      if (prefs?.disable_token_highlighting) {
-        this.disableTokenHighlighting = prefs.disable_token_highlighting;
-      }
-    });
   }
 
   override ready() {
@@ -335,18 +327,21 @@
     super.disconnectedCallback();
   }
 
-  initLayers() {
-    return getPluginLoader()
-      .awaitPluginsLoaded()
-      .then(() => {
-        assertIsDefined(this.path, 'path');
-        this._layers = this._getLayers(this.path);
-        this._coverageRanges = [];
-        // We kick off fetching the data here, but we don't return the promise,
-        // so awaiting initLayers() will not wait for coverage data to be
-        // completely loaded.
-        this._getCoverageData();
-      });
+  async initLayers() {
+    const preferencesPromise = appContext.restApiService.getPreferences();
+    await getPluginLoader().awaitPluginsLoaded();
+    const prefs = await preferencesPromise;
+    const enableTokenHighlight =
+      appContext.flagsService.isEnabled(KnownExperimentId.TOKEN_HIGHLIGHTING) &&
+      !prefs?.disable_token_highlighting;
+
+    assertIsDefined(this.path, 'path');
+    this._layers = this.getLayers(this.path, enableTokenHighlight);
+    this._coverageRanges = [];
+    // We kick off fetching the data here, but we don't return the promise,
+    // so awaiting initLayers() will not wait for coverage data to be
+    // completely loaded.
+    this._getCoverageData();
   }
 
   diffChanged(diff?: DiffInfo) {
@@ -418,12 +413,9 @@
     }
   }
 
-  private _getLayers(path: string): DiffLayer[] {
+  private getLayers(path: string, enableTokenHighlight: boolean): DiffLayer[] {
     const layers = [];
-    if (
-      appContext.flagsService.isEnabled(KnownExperimentId.TOKEN_HIGHLIGHTING) &&
-      !this.disableTokenHighlighting
-    ) {
+    if (enableTokenHighlight) {
       layers.push(new TokenHighlightLayer(this));
     }
     layers.push(this.syntaxLayer);
@@ -740,7 +732,9 @@
   _threadsChanged(threads: CommentThread[]) {
     const threadEls = new Set<Object>();
     for (const thread of threads) {
-      threadEls.add(this._getOrCreateThread(thread));
+      const threadEl = this._createThreadElement(thread);
+      this._attachThreadElement(threadEl);
+      threadEls.add(threadEl);
     }
     // Remove all threads that are no longer existing.
     for (const threadEl of this.getThreadEls()) {
diff --git a/polygerrit-ui/app/elements/diff/gr-diff-host/gr-diff-host_test.js b/polygerrit-ui/app/elements/diff/gr-diff-host/gr-diff-host_test.js
index 344f9d8..ed3ffe0 100644
--- a/polygerrit-ui/app/elements/diff/gr-diff-host/gr-diff-host_test.js
+++ b/polygerrit-ui/app/elements/diff/gr-diff-host/gr-diff-host_test.js
@@ -17,19 +17,16 @@
 
 import '../../../test/common-test-setup-karma.js';
 import './gr-diff-host.js';
-import {GrDiffBuilderImage} from '../gr-diff-builder/gr-diff-builder-image.js';
-import {GerritNav} from '../../core/gr-navigation/gr-navigation.js';
+
 import {dom} from '@polymer/polymer/lib/legacy/polymer.dom.js';
-import {Side, createDefaultDiffPrefs} from '../../../constants/constants.js';
-import {createChange} from '../../../test/test-data-generators.js';
-import {CoverageType} from '../../../types/types.js';
-import {
-  addListenerForTest,
-  mockPromise,
-  stubRestApi,
-} from '../../../test/test-utils.js';
-import {EditPatchSetNum, ParentPatchSetNum} from '../../../types/common.js';
+import {createDefaultDiffPrefs, Side} from '../../../constants/constants.js';
 import {_testOnly_resetState} from '../../../services/comments/comments-model.js';
+import {createChange, createComment, createCommentThread} from '../../../test/test-data-generators.js';
+import {addListenerForTest, mockPromise, stubRestApi} from '../../../test/test-utils.js';
+import {EditPatchSetNum, ParentPatchSetNum} from '../../../types/common.js';
+import {CoverageType} from '../../../types/types.js';
+import {GerritNav} from '../../core/gr-navigation/gr-navigation.js';
+import {GrDiffBuilderImage} from '../gr-diff-builder/gr-diff-builder-image.js';
 
 const basicFixture = fixtureFromElement('gr-diff-host');
 
@@ -1127,6 +1124,35 @@
       assert.equal(threads[0].path, element.file.path);
     });
 
+    test('multiple threads created on the same range', () => {
+      element.patchRange = {
+        basePatchNum: 2,
+        patchNum: 3,
+      };
+      element.file = {basePath: 'file_renamed.txt', path: element.path};
+
+      const comment = createComment();
+      comment.range = {
+        start_line: 1,
+        start_character: 1,
+        end_line: 2,
+        end_character: 2,
+      };
+      const thread = createCommentThread([comment]);
+      element.threads = [thread];
+
+      let threads = dom(element.$.diff)
+          .queryDistributedElements('gr-comment-thread');
+
+      assert.equal(threads.length, 1);
+
+      element.threads= [...element.threads, thread];
+
+      threads = dom(element.$.diff)
+          .queryDistributedElements('gr-comment-thread');
+      assert.equal(threads.length, 2);
+    });
+
     test('thread should use new file path if first created' +
     'on patch set (left) but is base', () => {
       const diffSide = Side.LEFT;
@@ -1143,8 +1169,8 @@
         },
       }));
 
-      const threads = dom(element.$.diff)
-          .queryDistributedElements('gr-comment-thread');
+      const threads =
+          dom(element.$.diff).queryDistributedElements('gr-comment-thread');
 
       assert.equal(threads.length, 1);
       assert.equal(threads[0].diffSide, diffSide);
@@ -1167,8 +1193,8 @@
         },
       }));
 
-      const threads = dom(element.$.diff)
-          .queryDistributedElements('gr-comment-thread');
+      const threads =
+          dom(element.$.diff).queryDistributedElements('gr-comment-thread');
       assert.equal(threads.length, 0);
       assert.isTrue(alertSpy.called);
     });
diff --git a/polygerrit-ui/app/elements/diff/gr-diff-image-viewer/gr-image-viewer.ts b/polygerrit-ui/app/elements/diff/gr-diff-image-viewer/gr-image-viewer.ts
index 496d6bf..3a05e7d 100644
--- a/polygerrit-ui/app/elements/diff/gr-diff-image-viewer/gr-image-viewer.ts
+++ b/polygerrit-ui/app/elements/diff/gr-diff-image-viewer/gr-image-viewer.ts
@@ -267,11 +267,11 @@
       outline: 1px solid transparent;
       border: 1px solid var(--primary-button-background-color);
     }
-    paper-button[unelevated] {
+    paper-button.unelevated {
       color: var(--primary-button-text-color);
       background-color: var(--primary-button-background-color);
     }
-    paper-button[outlined] {
+    paper-button.outlined {
       color: var(--primary-button-background-color);
     }
     #version-switcher {
@@ -422,23 +422,25 @@
       />
     `;
 
-    const sourceImageWithHighlight = html`
-      <div id="source-plus-highlight-container">
-        ${sourceImage}
-        <img
-          id="highlight-image"
-          style="${styleMap({
-            opacity: this.showHighlight ? '1' : '0',
-            // When the highlight layer is not being shown, saving the image or
-            // opening it in a new tab from the context menu, e.g. for external
-            // comparison, should give back the source image, not the highlight
-            // layer.
-            'pointer-events': this.showHighlight ? 'auto' : 'none',
-          })}"
-          src="${this.diffHighlightSrc}"
-        />
-      </div>
-    `;
+    const sourceImageWithHighlight = this.diffHighlightSrc
+      ? html`
+          <div id="source-plus-highlight-container">
+            ${sourceImage}
+            <img
+              id="highlight-image"
+              style="${styleMap({
+                opacity: this.showHighlight ? '1' : '0',
+                // When the highlight layer is not being shown, saving the image or
+                // opening it in a new tab from the context menu, e.g. for external
+                // comparison, should give back the source image, not the highlight
+                // layer.
+                'pointer-events': this.showHighlight ? 'auto' : 'none',
+              })}"
+              src="${this.diffHighlightSrc}"
+            />
+          </div>
+        `
+      : '';
 
     const versionExplanation = html`
       <div id="version-explanation">
@@ -448,12 +450,20 @@
 
     // This uses the unelevated and outlined attributes from mwc-button with
     // manual styling, for a more seamless transition later.
+    const leftClasses = {
+      left: true,
+      unelevated: this.baseSelected,
+      outlined: !this.baseSelected,
+    };
+    const rightClasses = {
+      right: true,
+      unelevated: !this.baseSelected,
+      outlined: this.baseSelected,
+    };
     const versionToggle = html`
       <div id="version-switcher">
         <paper-button
-          class="left"
-          ?unelevated=${this.baseSelected}
-          ?outlined=${!this.baseSelected}
+          class="${classMap(leftClasses)}"
           @click="${this.selectBase}"
         >
           Base
@@ -461,9 +471,7 @@
         <paper-fab mini icon="gr-icons:swapHoriz" @click="${this.manualBlink}">
         </paper-fab>
         <paper-button
-          class="right"
-          ?unelevated=${!this.baseSelected}
-          ?outlined=${this.baseSelected}
+          class="${classMap(rightClasses)}"
           @click="${this.selectRevision}"
         >
           Revision
@@ -509,7 +517,7 @@
         <paper-listbox
           slot="dropdown-content"
           selected="fit"
-          attr-for-selected="value"
+          .attrForSelected="${'value'}"
           @selected-changed="${this.zoomControlChanged}"
         >
           ${this.zoomLevels.map(
diff --git a/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view.ts b/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view.ts
index bb5ce94..e2baec9 100644
--- a/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view.ts
+++ b/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view.ts
@@ -37,6 +37,7 @@
 import {
   KeyboardShortcutMixin,
   Shortcut,
+  ShortcutSection,
 } from '../../../mixins/keyboard-shortcut-mixin/keyboard-shortcut-mixin';
 import {
   GeneratedWebLink,
@@ -98,14 +99,15 @@
 } from '../../../utils/comment-util';
 import {AppElementParams} from '../../gr-app-types';
 import {
-  CustomKeyboardEvent,
+  IronKeyboardEventListener,
+  IronKeyboardEvent,
   EventType,
   OpenFixPreviewEvent,
 } from '../../../types/events';
 import {fireAlert, fireEvent, fireTitleChange} from '../../../utils/event-util';
 import {GerritView} from '../../../services/router/router-model';
 import {assertIsDefined} from '../../../utils/common-util';
-import {toggleClass, getKeyboardEvent} from '../../../utils/dom-util';
+import {toggleClass} from '../../../utils/dom-util';
 import {CursorMoveResult} from '../../../api/core';
 import {throttleWrap} from '../../../utils/async-util';
 import {changeComments$} from '../../../services/comments/comments-model';
@@ -341,7 +343,9 @@
 
   private readonly commentsService = appContext.commentsService;
 
-  _throttledToggleFileReviewed?: EventListener;
+  private readonly shortcuts = appContext.shortcutsService;
+
+  _throttledToggleFileReviewed?: IronKeyboardEventListener;
 
   _onRenderHandler?: EventListener;
 
@@ -352,7 +356,7 @@
   override connectedCallback() {
     super.connectedCallback();
     this._throttledToggleFileReviewed = throttleWrap(e =>
-      this._handleToggleFileReviewed(e as CustomKeyboardEvent)
+      this._handleToggleFileReviewed(e)
     );
     this._getLoggedIn().then(loggedIn => {
       this._loggedIn = loggedIn;
@@ -518,38 +522,38 @@
     );
   }
 
-  _handleToggleFileReviewed(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) return;
+  _handleToggleFileReviewed(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) return;
     if (this.modifierPressed(e)) return;
 
     e.preventDefault();
     this._setReviewed(!this.$.reviewed.checked);
   }
 
-  _handleEscKey(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) return;
+  _handleEscKey(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) return;
     if (this.modifierPressed(e)) return;
 
     e.preventDefault();
     this.$.diffHost.displayLine = false;
   }
 
-  _handleLeftPane(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) return;
+  _handleLeftPane(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) return;
 
     e.preventDefault();
     this.cursor.moveLeft();
   }
 
-  _handleRightPane(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) return;
+  _handleRightPane(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) return;
 
     e.preventDefault();
     this.cursor.moveRight();
   }
 
-  _handlePrevLineOrFileWithComments(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) return;
+  _handlePrevLineOrFileWithComments(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) return;
 
     if (
       e.detail.keyboardEvent?.shiftKey &&
@@ -568,8 +572,8 @@
     this.cursor.moveUp();
   }
 
-  _handleVisibleLine(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) return;
+  _handleVisibleLine(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) return;
 
     e.preventDefault();
     this.cursor.moveToVisibleArea();
@@ -579,8 +583,8 @@
     this.$.applyFixDialog.open(e);
   }
 
-  _handleNextLineOrFileWithComments(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) return;
+  _handleNextLineOrFileWithComments(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) return;
 
     if (
       e.detail.keyboardEvent?.shiftKey &&
@@ -638,39 +642,41 @@
     );
   }
 
-  _handleNewComment(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) return;
-    if (this.modifierPressed(e)) return;
+  _handleNewComment(ike: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(ike)) return;
+    if (this.modifierPressed(ike)) return;
 
-    e.preventDefault();
+    ike.preventDefault();
     this.classList.remove('hideComments');
     this.cursor.createCommentInPlace();
   }
 
-  _handlePrevFile(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) return;
+  _handlePrevFile(ike: IronKeyboardEvent) {
+    const ke = ike.detail.keyboardEvent;
+    if (this.shortcuts.shouldSuppress(ike)) return;
     // Check for meta key to avoid overriding native chrome shortcut.
-    if (getKeyboardEvent(e).metaKey) return;
+    if (ke.metaKey) return;
     if (!this._path) return;
     if (!this._fileList) return;
 
-    e.preventDefault();
+    ike.preventDefault();
     this._navToFile(this._path, this._fileList, -1);
   }
 
-  _handleNextFile(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) return;
+  _handleNextFile(ike: IronKeyboardEvent) {
+    const ke = ike.detail.keyboardEvent;
+    if (this.shortcuts.shouldSuppress(ike)) return;
     // Check for meta key to avoid overriding native chrome shortcut.
-    if (getKeyboardEvent(e).metaKey) return;
+    if (ke.metaKey) return;
     if (!this._path) return;
     if (!this._fileList) return;
 
-    e.preventDefault();
+    ike.preventDefault();
     this._navToFile(this._path, this._fileList, 1);
   }
 
-  _handleNextChunkOrCommentThread(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) return;
+  _handleNextChunkOrCommentThread(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) return;
 
     e.preventDefault();
     if (e.detail.keyboardEvent?.shiftKey) {
@@ -730,8 +736,8 @@
     this._navToFile(this._path, unreviewedFiles, direction === 'next' ? 1 : -1);
   }
 
-  _handlePrevChunkOrCommentThread(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) return;
+  _handlePrevChunkOrCommentThread(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) return;
 
     e.preventDefault();
     if (e.detail.keyboardEvent?.shiftKey) {
@@ -746,8 +752,8 @@
   }
 
   // Similar to gr-change-view._handleOpenReplyDialog
-  _handleOpenReplyDialog(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) return;
+  _handleOpenReplyDialog(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) return;
     if (this.modifierPressed(e)) return;
     this._getLoggedIn().then(isLoggedIn => {
       if (!isLoggedIn) {
@@ -761,16 +767,16 @@
     });
   }
 
-  _handleToggleLeftPane(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) return;
+  _handleToggleLeftPane(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) return;
     if (!e.detail.keyboardEvent?.shiftKey) return;
 
     e.preventDefault();
     this.$.diffHost.toggleLeftDiff();
   }
 
-  _handleOpenDownloadDialog(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) return;
+  _handleOpenDownloadDialog(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) return;
     if (this.modifierPressed(e)) return;
 
     this.set('changeViewState.showDownloadDialog', true);
@@ -778,16 +784,16 @@
     this._navToChangeView();
   }
 
-  _handleUpToChange(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) return;
+  _handleUpToChange(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) return;
     if (this.modifierPressed(e)) return;
 
     e.preventDefault();
     this._navToChangeView();
   }
 
-  _handleCommaKey(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) return;
+  _handleCommaKey(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) return;
     if (this.modifierPressed(e)) return;
     if (this._diffPrefsDisabled) return;
 
@@ -795,8 +801,8 @@
     this.$.diffPreferencesDialog.open();
   }
 
-  _handleToggleDiffMode(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) return;
+  _handleToggleDiffMode(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) return;
     if (this.modifierPressed(e)) return;
 
     e.preventDefault();
@@ -1692,28 +1698,28 @@
     this._loadBlame();
   }
 
-  _handleToggleBlame(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) return;
+  _handleToggleBlame(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) return;
     if (this.modifierPressed(e)) return;
 
     this._toggleBlame();
   }
 
-  _handleToggleHideAllCommentThreads(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) return;
+  _handleToggleHideAllCommentThreads(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) return;
     if (this.modifierPressed(e)) return;
 
     toggleClass(this, 'hideComments');
   }
 
-  _handleOpenFileList(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) return;
+  _handleOpenFileList(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) return;
     if (this.modifierPressed(e)) return;
     this.$.dropdown.open();
   }
 
-  _handleDiffAgainstBase(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) return;
+  _handleDiffAgainstBase(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) return;
     if (!this._change) return;
     if (!this._path) return;
     if (!this._patchRange) return;
@@ -1729,8 +1735,8 @@
     );
   }
 
-  _handleDiffBaseAgainstLeft(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) return;
+  _handleDiffBaseAgainstLeft(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) return;
     if (!this._change) return;
     if (!this._path) return;
     if (!this._patchRange) return;
@@ -1750,8 +1756,8 @@
     );
   }
 
-  _handleDiffAgainstLatest(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) return;
+  _handleDiffAgainstLatest(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) return;
     if (!this._change) return;
     if (!this._path) return;
     if (!this._patchRange) return;
@@ -1770,8 +1776,8 @@
     );
   }
 
-  _handleDiffRightAgainstLatest(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) return;
+  _handleDiffRightAgainstLatest(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) return;
     if (!this._change) return;
     if (!this._path) return;
     if (!this._patchRange) return;
@@ -1789,8 +1795,8 @@
     );
   }
 
-  _handleDiffBaseAgainstLatest(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) return;
+  _handleDiffBaseAgainstLatest(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) return;
     if (!this._change) return;
     if (!this._path) return;
     if (!this._patchRange) return;
@@ -1827,8 +1833,8 @@
     return '';
   }
 
-  _handleToggleAllDiffContext(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) return;
+  _handleToggleAllDiffContext(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) return;
 
     this.$.diffHost.toggleAllContext();
   }
@@ -1837,8 +1843,8 @@
     return disableDiffPrefs || !loggedIn;
   }
 
-  _handleNextUnreviewedFile(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) return;
+  _handleNextUnreviewedFile(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) return;
     this._setReviewed(true);
     this.navigateToUnreviewedFile('next');
   }
@@ -1898,6 +1904,10 @@
   _computeTruncatedPath(path?: string) {
     return path ? computeTruncatedPath(path) : '';
   }
+
+  createTitle(shortcutName: Shortcut, section: ShortcutSection) {
+    return this.shortcuts.createTitle(shortcutName, section);
+  }
 }
 
 declare global {
diff --git a/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view_html.ts b/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view_html.ts
index 4f1047f..b25be5a8 100644
--- a/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view_html.ts
+++ b/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view_html.ts
@@ -141,11 +141,6 @@
     .separator.hide {
       display: none;
     }
-    gr-dropdown-list {
-      --trigger-style: {
-        text-transform: none;
-      }
-    }
     .editButtona a {
       text-decoration: none;
     }
diff --git a/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view_test.js b/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view_test.js
index a3de30a..735624a 100644
--- a/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view_test.js
+++ b/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view_test.js
@@ -19,8 +19,7 @@
 import './gr-diff-view.js';
 import {GerritNav} from '../../core/gr-navigation/gr-navigation.js';
 import {ChangeStatus} from '../../../constants/constants.js';
-import {TestKeyboardShortcutBinder, stubRestApi} from '../../../test/test-utils.js';
-import {Shortcut} from '../../../mixins/keyboard-shortcut-mixin/keyboard-shortcut-mixin.js';
+import {stubRestApi} from '../../../test/test-utils.js';
 import {ChangeComments} from '../gr-comment-api/gr-comment-api.js';
 import {GerritView} from '../../../services/router/router-model.js';
 import {
@@ -41,42 +40,6 @@
     let clock;
     let diffCommentsStub;
 
-    suiteSetup(() => {
-      const kb = TestKeyboardShortcutBinder.push();
-      kb.bindShortcut(Shortcut.LEFT_PANE, 'shift+left');
-      kb.bindShortcut(Shortcut.RIGHT_PANE, 'shift+right');
-      kb.bindShortcut(Shortcut.NEXT_LINE, 'j', 'down');
-      kb.bindShortcut(Shortcut.PREV_LINE, 'k', 'up');
-      kb.bindShortcut(Shortcut.NEXT_FILE_WITH_COMMENTS, 'shift+j');
-      kb.bindShortcut(Shortcut.PREV_FILE_WITH_COMMENTS, 'shift+k');
-      kb.bindShortcut(Shortcut.NEW_COMMENT, 'c');
-      kb.bindShortcut(Shortcut.SAVE_COMMENT, 'ctrl+s');
-      kb.bindShortcut(Shortcut.NEXT_FILE, ']');
-      kb.bindShortcut(Shortcut.PREV_FILE, '[');
-      kb.bindShortcut(Shortcut.NEXT_CHUNK, 'n');
-      kb.bindShortcut(Shortcut.NEXT_COMMENT_THREAD, 'shift+n');
-      kb.bindShortcut(Shortcut.PREV_CHUNK, 'p');
-      kb.bindShortcut(Shortcut.PREV_COMMENT_THREAD, 'shift+p');
-      kb.bindShortcut(Shortcut.OPEN_REPLY_DIALOG, 'a');
-      kb.bindShortcut(Shortcut.OPEN_DOWNLOAD_DIALOG, 'd');
-      kb.bindShortcut(Shortcut.TOGGLE_LEFT_PANE, 'shift+a');
-      kb.bindShortcut(Shortcut.UP_TO_CHANGE, 'u');
-      kb.bindShortcut(Shortcut.OPEN_DIFF_PREFS, ',');
-      kb.bindShortcut(Shortcut.TOGGLE_DIFF_MODE, 'm');
-      kb.bindShortcut(Shortcut.TOGGLE_FILE_REVIEWED, 'r');
-      kb.bindShortcut(Shortcut.TOGGLE_ALL_DIFF_CONTEXT, 'shift+x');
-      kb.bindShortcut(Shortcut.EXPAND_ALL_COMMENT_THREADS, 'e');
-      kb.bindShortcut(Shortcut.TOGGLE_HIDE_ALL_COMMENT_THREADS, 'h');
-      kb.bindShortcut(Shortcut.COLLAPSE_ALL_COMMENT_THREADS, 'shift+e');
-      kb.bindShortcut(Shortcut.NEXT_UNREVIEWED_FILE, 'shift+m');
-      kb.bindShortcut(Shortcut.TOGGLE_BLAME, 'b');
-      kb.bindShortcut(Shortcut.OPEN_FILE_LIST, 'f');
-    });
-
-    suiteTeardown(() => {
-      TestKeyboardShortcutBinder.pop();
-    });
-
     const PARENT = 'PARENT';
 
     function getFilesFromFileList(fileList) {
@@ -504,16 +467,16 @@
       sinon.stub(element, '_setReviewed');
       sinon.spy(element, '_handleToggleFileReviewed');
       element.$.reviewed.checked = false;
-      MockInteractions.pressAndReleaseKeyOn(element, 82, 'shift', 'r');
+      MockInteractions.keyUpOn(element, 82, 'shift', 'r');
       assert.isFalse(element._setReviewed.called);
       assert.isTrue(element._handleToggleFileReviewed.calledOnce);
 
-      MockInteractions.pressAndReleaseKeyOn(element, 82, null, 'r');
+      MockInteractions.keyUpOn(element, 82, null, 'r');
       assert.isTrue(element._handleToggleFileReviewed.calledOnce);
 
       clock.tick(1000);
 
-      MockInteractions.pressAndReleaseKeyOn(element, 82, null, 'r');
+      MockInteractions.keyUpOn(element, 82, null, 'r');
       assert.isTrue(element._handleToggleFileReviewed.calledTwice);
       assert.isTrue(element._setReviewed.called);
       assert.equal(element._setReviewed.lastCall.args[0], true);
@@ -573,7 +536,6 @@
         basePatchNum: 5,
         patchNum: 10,
       };
-      sinon.stub(element, 'shouldSuppressKeyboardShortcut').returns(false);
       const diffNavStub = sinon.stub(GerritNav, 'navigateToDiff');
       element._handleDiffAgainstBase(new CustomEvent(''));
       const args = diffNavStub.getCall(0).args;
@@ -590,7 +552,6 @@
         basePatchNum: 5,
         patchNum: 10,
       };
-      sinon.stub(element, 'shouldSuppressKeyboardShortcut').returns(false);
       const diffNavStub = sinon.stub(GerritNav, 'navigateToDiff');
       element._handleDiffAgainstLatest(new CustomEvent(''));
       const args = diffNavStub.getCall(0).args;
@@ -608,7 +569,6 @@
         basePatchNum: 1,
       };
       element.params = {};
-      sinon.stub(element, 'shouldSuppressKeyboardShortcut').returns(false);
       const diffNavStub = sinon.stub(GerritNav, 'navigateToDiff');
       element._handleDiffBaseAgainstLeft(new CustomEvent(''));
       assert(diffNavStub.called);
@@ -631,7 +591,6 @@
           sinon.stub(element, '_paramsChanged');
           element.params = {commentLink: true, view: GerritView.DIFF};
           element._focusLineNum = 10;
-          sinon.stub(element, 'shouldSuppressKeyboardShortcut').returns(false);
           const diffNavStub = sinon.stub(GerritNav, 'navigateToDiff');
           element._handleDiffBaseAgainstLeft(new CustomEvent(''));
           assert(diffNavStub.called);
@@ -650,7 +609,6 @@
         basePatchNum: 1,
         patchNum: 3,
       };
-      sinon.stub(element, 'shouldSuppressKeyboardShortcut').returns(false);
       const diffNavStub = sinon.stub(GerritNav, 'navigateToDiff');
       element._handleDiffRightAgainstLatest(new CustomEvent(''));
       assert(diffNavStub.called);
@@ -668,7 +626,6 @@
         basePatchNum: 1,
         patchNum: 3,
       };
-      sinon.stub(element, 'shouldSuppressKeyboardShortcut').returns(false);
       const diffNavStub = sinon.stub(GerritNav, 'navigateToDiff');
       element._handleDiffBaseAgainstLatest(new CustomEvent(''));
       assert(diffNavStub.called);
@@ -682,7 +639,7 @@
       sinon.stub(element, '_getLoggedIn').returns(Promise.resolve(false));
       const loggedInErrorSpy = sinon.spy();
       element.addEventListener('show-auth-required', loggedInErrorSpy);
-      MockInteractions.pressAndReleaseKeyOn(element, 65, null, 'a');
+      MockInteractions.keyUpOn(element, 65, null, 'a');
       await flush();
       assert.isTrue(changeNavStub.notCalled, 'The `a` keyboard shortcut ' +
         'should only work when the user is logged in.');
@@ -708,7 +665,7 @@
       sinon.stub(element, '_getLoggedIn').returns(Promise.resolve(true));
       const loggedInErrorSpy = sinon.spy();
       element.addEventListener('show-auth-required', loggedInErrorSpy);
-      MockInteractions.pressAndReleaseKeyOn(element, 65, null, 'a');
+      MockInteractions.keyUpOn(element, 65, null, 'a');
       await flush();
       assert.isTrue(element.changeViewState.showReplyDialog);
       assert(changeNavStub.lastCall.calledWithExactly(element._change, 10,
@@ -734,7 +691,7 @@
           sinon.stub(element, '_getLoggedIn').returns(Promise.resolve(true));
           const loggedInErrorSpy = sinon.spy();
           element.addEventListener('show-auth-required', loggedInErrorSpy);
-          MockInteractions.pressAndReleaseKeyOn(element, 65, null, 'a');
+          MockInteractions.keyUpOn(element, 65, null, 'a');
           await flush();
           assert.isTrue(element.changeViewState.showReplyDialog);
           assert(changeNavStub.lastCall.calledWithExactly(element._change, 1,
@@ -798,7 +755,7 @@
       'Should navigate to /c/42/5..10');
 
       assert.isUndefined(element.changeViewState.showDownloadDialog);
-      MockInteractions.pressAndReleaseKeyOn(element, 68, null, 'd');
+      MockInteractions.keyUpOn(element, 68, null, 'd');
       assert.isTrue(element.changeViewState.showDownloadDialog);
     });
 
@@ -1520,8 +1477,9 @@
     });
 
     test('_handleToggleDiffMode', () => {
-      sinon.stub(element, 'shouldSuppressKeyboardShortcut').returns(false);
-      const e = {preventDefault: () => {}};
+      const e = new CustomEvent('keydown', {
+        detail: {keyboardEvent: new KeyboardEvent('keydown'), key: 'x'},
+      });
       // Initial state.
       assert.equal(element._getDiffViewMode(), 'SIDE_BY_SIDE');
 
@@ -1732,7 +1690,7 @@
       test('toggle blame with shortcut', () => {
         const toggleBlame = sinon.stub(
             element.$.diffHost, 'loadBlame').callsFake(() => Promise.resolve());
-        MockInteractions.pressAndReleaseKeyOn(element, 66, null, 'b');
+        MockInteractions.keyUpOn(element, 66, null, 'b');
         assert.isTrue(toggleBlame.calledOnce);
       });
     });
diff --git a/polygerrit-ui/app/elements/diff/gr-patch-range-select/gr-patch-range-select_html.ts b/polygerrit-ui/app/elements/diff/gr-patch-range-select/gr-patch-range-select_html.ts
index ebbb0d6..26944a4 100644
--- a/polygerrit-ui/app/elements/diff/gr-patch-range-select/gr-patch-range-select_html.ts
+++ b/polygerrit-ui/app/elements/diff/gr-patch-range-select/gr-patch-range-select_html.ts
@@ -33,11 +33,8 @@
       margin: 0 var(--spacing-m);
     }
     gr-dropdown-list {
-      --trigger-style: {
-        color: var(--deemphasized-text-color);
-        text-transform: none;
-        font-family: var(--font-family);
-      }
+      --trigger-style-text-color: var(--deemphasized-text-color);
+      --trigger-style-font-family: var(--font-family);
     }
     @media screen and (max-width: 50em) {
       .filesWeblinks {
diff --git a/polygerrit-ui/app/elements/diff/gr-range-header/gr-range-header.ts b/polygerrit-ui/app/elements/diff/gr-range-header/gr-range-header.ts
index 1c2c074..dcf7236 100644
--- a/polygerrit-ui/app/elements/diff/gr-range-header/gr-range-header.ts
+++ b/polygerrit-ui/app/elements/diff/gr-range-header/gr-range-header.ts
@@ -16,6 +16,7 @@
  */
 import {LitElement, css, html} from 'lit';
 import {customElement, property} from 'lit/decorators';
+import '@polymer/iron-icon/iron-icon';
 
 /**
  * Represents a header (label) for a code chunk whenever showing
diff --git a/polygerrit-ui/app/elements/diff/gr-selection-action-box/gr-selection-action-box.ts b/polygerrit-ui/app/elements/diff/gr-selection-action-box/gr-selection-action-box.ts
index 3b026b3..8821725 100644
--- a/polygerrit-ui/app/elements/diff/gr-selection-action-box/gr-selection-action-box.ts
+++ b/polygerrit-ui/app/elements/diff/gr-selection-action-box/gr-selection-action-box.ts
@@ -15,6 +15,7 @@
  * limitations under the License.
  */
 import '../../../styles/shared-styles';
+import '../../shared/gr-tooltip/gr-tooltip';
 import {GrTooltip} from '../../shared/gr-tooltip/gr-tooltip';
 import {customElement, property} from '@polymer/decorators';
 import {flush} from '@polymer/polymer/lib/legacy/polymer.dom';
diff --git a/polygerrit-ui/app/elements/edit/gr-default-editor/gr-default-editor.ts b/polygerrit-ui/app/elements/edit/gr-default-editor/gr-default-editor.ts
index 480b8fe..5312be2 100644
--- a/polygerrit-ui/app/elements/edit/gr-default-editor/gr-default-editor.ts
+++ b/polygerrit-ui/app/elements/edit/gr-default-editor/gr-default-editor.ts
@@ -14,7 +14,6 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
 import {sharedStyles} from '../../../styles/shared-styles';
 import {LitElement, css, html} from 'lit';
 import {customElement, property} from 'lit/decorators';
@@ -62,7 +61,7 @@
   override render() {
     return html` <textarea
       id="textarea"
-      value="${this.fileContent}"
+      .value="${this.fileContent}"
       @input=${this._handleTextareaInput}
     ></textarea>`;
   }
diff --git a/polygerrit-ui/app/elements/edit/gr-edit-controls/gr-edit-controls.ts b/polygerrit-ui/app/elements/edit/gr-edit-controls/gr-edit-controls.ts
index f0a3ca1..d87b573 100644
--- a/polygerrit-ui/app/elements/edit/gr-edit-controls/gr-edit-controls.ts
+++ b/polygerrit-ui/app/elements/edit/gr-edit-controls/gr-edit-controls.ts
@@ -351,7 +351,7 @@
     }
   }
 
-  _handleKeyPress(event: InputEvent) {
+  _handleKeyPress(event: KeyboardEvent) {
     event.preventDefault();
     event.stopImmediatePropagation();
   }
diff --git a/polygerrit-ui/app/elements/edit/gr-edit-file-controls/gr-edit-file-controls.ts b/polygerrit-ui/app/elements/edit/gr-edit-file-controls/gr-edit-file-controls.ts
index db45c33..418c368 100644
--- a/polygerrit-ui/app/elements/edit/gr-edit-file-controls/gr-edit-file-controls.ts
+++ b/polygerrit-ui/app/elements/edit/gr-edit-file-controls/gr-edit-file-controls.ts
@@ -49,6 +49,9 @@
           display: flex;
           justify-content: flex-end;
         }
+        gr-dropdown {
+          --gr-button-padding: var(--spacing-xs) var(--spacing-s);
+        }
         #actions {
           margin-right: var(--spacing-l);
         }
@@ -62,12 +65,6 @@
     /* eslint-disable lit/prefer-static-styles */
     const customStyle = html`
       <style>
-        gr-button,
-        gr-dropdown {
-          --gr-button: {
-            height: 1.8em;
-          }
-        }
         gr-dropdown {
           --gr-dropdown-item: {
             background-color: transparent;
diff --git a/polygerrit-ui/app/elements/edit/gr-editor-view/gr-editor-view.ts b/polygerrit-ui/app/elements/edit/gr-editor-view/gr-editor-view.ts
index 6f2d27e..ad7e015 100644
--- a/polygerrit-ui/app/elements/edit/gr-editor-view/gr-editor-view.ts
+++ b/polygerrit-ui/app/elements/edit/gr-editor-view/gr-editor-view.ts
@@ -47,6 +47,7 @@
 import {GrButton} from '../../shared/gr-button/gr-button';
 import {GrDefaultEditor} from '../gr-default-editor/gr-default-editor';
 import {GrEndpointDecorator} from '../../plugins/gr-endpoint-decorator/gr-endpoint-decorator';
+import {IronKeyboardEvent} from '../../../types/events';
 
 const RESTORED_MESSAGE = 'Content restored from a previous edit.';
 const SAVING_MESSAGE = 'Saving changes...';
@@ -393,7 +394,7 @@
     );
   }
 
-  _handleSaveShortcut(e: KeyboardEvent) {
+  _handleSaveShortcut(e: IronKeyboardEvent) {
     e.preventDefault();
     if (!this._saveDisabled) {
       this._saveEdit();
diff --git a/polygerrit-ui/app/elements/gr-app-element.ts b/polygerrit-ui/app/elements/gr-app-element.ts
index b6fe60b..3b93bea 100644
--- a/polygerrit-ui/app/elements/gr-app-element.ts
+++ b/polygerrit-ui/app/elements/gr-app-element.ts
@@ -43,7 +43,6 @@
 import {
   KeyboardShortcutMixin,
   Shortcut,
-  SPECIAL_SHORTCUT,
 } from '../mixins/keyboard-shortcut-mixin/keyboard-shortcut-mixin';
 import {GerritNav} from './core/gr-navigation/gr-navigation';
 import {appContext} from '../services/app-context';
@@ -69,7 +68,7 @@
 import {GrMainHeader} from './core/gr-main-header/gr-main-header';
 import {GrSettingsView} from './settings/gr-settings-view/gr-settings-view';
 import {
-  CustomKeyboardEvent,
+  IronKeyboardEvent,
   DialogChangeEventDetail,
   EventType,
   LocationChangeEvent,
@@ -215,6 +214,8 @@
 
   private readonly restApiService = appContext.restApiService;
 
+  private readonly shortcuts = appContext.shortcutsService;
+
   override keyboardShortcuts() {
     return {
       [Shortcut.OPEN_SHORTCUT_HELP_DIALOG]: '_showKeyboardShortcuts',
@@ -232,7 +233,6 @@
     // model changes and updates the config model, but at the moment the service
     // is not called from anywhere.
     appContext.configService;
-    this._bindKeyboardShortcuts();
     document.addEventListener(EventType.PAGE_ERROR, e => {
       this._handlePageError(e);
     });
@@ -307,159 +307,6 @@
     };
   }
 
-  _bindKeyboardShortcuts() {
-    this.bindShortcut(
-      Shortcut.SEND_REPLY,
-      SPECIAL_SHORTCUT.DOC_ONLY,
-      'ctrl+enter',
-      'meta+enter'
-    );
-    this.bindShortcut(Shortcut.EMOJI_DROPDOWN, SPECIAL_SHORTCUT.DOC_ONLY, ':');
-
-    this.bindShortcut(Shortcut.OPEN_SHORTCUT_HELP_DIALOG, '?');
-    this.bindShortcut(
-      Shortcut.GO_TO_USER_DASHBOARD,
-      SPECIAL_SHORTCUT.GO_KEY,
-      'i'
-    );
-    this.bindShortcut(
-      Shortcut.GO_TO_OPENED_CHANGES,
-      SPECIAL_SHORTCUT.GO_KEY,
-      'o'
-    );
-    this.bindShortcut(
-      Shortcut.GO_TO_MERGED_CHANGES,
-      SPECIAL_SHORTCUT.GO_KEY,
-      'm'
-    );
-    this.bindShortcut(
-      Shortcut.GO_TO_ABANDONED_CHANGES,
-      SPECIAL_SHORTCUT.GO_KEY,
-      'a'
-    );
-    this.bindShortcut(
-      Shortcut.GO_TO_WATCHED_CHANGES,
-      SPECIAL_SHORTCUT.GO_KEY,
-      'w'
-    );
-
-    this.bindShortcut(Shortcut.CURSOR_NEXT_CHANGE, 'j');
-    this.bindShortcut(Shortcut.CURSOR_PREV_CHANGE, 'k');
-    this.bindShortcut(Shortcut.OPEN_CHANGE, 'o');
-    this.bindShortcut(Shortcut.NEXT_PAGE, 'n', ']');
-    this.bindShortcut(Shortcut.PREV_PAGE, 'p', '[');
-    this.bindShortcut(Shortcut.TOGGLE_CHANGE_REVIEWED, 'r:keyup');
-    this.bindShortcut(Shortcut.TOGGLE_CHANGE_STAR, 's:keydown');
-    this.bindShortcut(Shortcut.REFRESH_CHANGE_LIST, 'shift+r:keyup');
-    this.bindShortcut(Shortcut.EDIT_TOPIC, 't');
-    this.bindShortcut(Shortcut.OPEN_SUBMIT_DIALOG, 'shift+s');
-    this.bindShortcut(Shortcut.TOGGLE_ATTENTION_SET, 'shift+t');
-
-    this.bindShortcut(Shortcut.OPEN_REPLY_DIALOG, 'a:keyup');
-    this.bindShortcut(Shortcut.OPEN_DOWNLOAD_DIALOG, 'd:keyup');
-    this.bindShortcut(Shortcut.EXPAND_ALL_MESSAGES, 'x');
-    this.bindShortcut(Shortcut.COLLAPSE_ALL_MESSAGES, 'z');
-    this.bindShortcut(Shortcut.REFRESH_CHANGE, 'shift+r:keyup');
-    this.bindShortcut(Shortcut.UP_TO_DASHBOARD, 'u');
-    this.bindShortcut(Shortcut.UP_TO_CHANGE, 'u');
-    this.bindShortcut(Shortcut.TOGGLE_DIFF_MODE, 'm:keyup');
-    this.bindShortcut(
-      Shortcut.DIFF_AGAINST_BASE,
-      SPECIAL_SHORTCUT.V_KEY,
-      'down',
-      's'
-    );
-    // this keyboard shortcut is used in toast _displayDiffAgainstLatestToast
-    // in gr-diff-view. Any updates here should be reflected there
-    this.bindShortcut(
-      Shortcut.DIFF_AGAINST_LATEST,
-      SPECIAL_SHORTCUT.V_KEY,
-      'up',
-      'w'
-    );
-    // this keyboard shortcut is used in toast _displayDiffBaseAgainstLeftToast
-    // in gr-diff-view. Any updates here should be reflected there
-    this.bindShortcut(
-      Shortcut.DIFF_BASE_AGAINST_LEFT,
-      SPECIAL_SHORTCUT.V_KEY,
-      'left',
-      'a'
-    );
-    this.bindShortcut(
-      Shortcut.DIFF_RIGHT_AGAINST_LATEST,
-      SPECIAL_SHORTCUT.V_KEY,
-      'right',
-      'd'
-    );
-    this.bindShortcut(
-      Shortcut.DIFF_BASE_AGAINST_LATEST,
-      SPECIAL_SHORTCUT.V_KEY,
-      'b'
-    );
-
-    this.bindShortcut(Shortcut.NEXT_LINE, 'j', 'down');
-    this.bindShortcut(Shortcut.PREV_LINE, 'k', 'up');
-    if (this._isCursorManagerSupportMoveToVisibleLine()) {
-      this.bindShortcut(Shortcut.VISIBLE_LINE, '.');
-    }
-    this.bindShortcut(Shortcut.NEXT_CHUNK, 'n');
-    this.bindShortcut(Shortcut.PREV_CHUNK, 'p');
-    this.bindShortcut(Shortcut.TOGGLE_ALL_DIFF_CONTEXT, 'shift+x');
-    this.bindShortcut(Shortcut.NEXT_COMMENT_THREAD, 'shift+n');
-    this.bindShortcut(Shortcut.PREV_COMMENT_THREAD, 'shift+p');
-    this.bindShortcut(
-      Shortcut.EXPAND_ALL_COMMENT_THREADS,
-      SPECIAL_SHORTCUT.DOC_ONLY,
-      'e'
-    );
-    this.bindShortcut(
-      Shortcut.COLLAPSE_ALL_COMMENT_THREADS,
-      SPECIAL_SHORTCUT.DOC_ONLY,
-      'shift+e'
-    );
-    this.bindShortcut(Shortcut.LEFT_PANE, 'shift+left');
-    this.bindShortcut(Shortcut.RIGHT_PANE, 'shift+right');
-    this.bindShortcut(Shortcut.TOGGLE_LEFT_PANE, 'shift+a');
-    this.bindShortcut(Shortcut.NEW_COMMENT, 'c');
-    this.bindShortcut(
-      Shortcut.SAVE_COMMENT,
-      'ctrl+enter',
-      'meta+enter',
-      'ctrl+s',
-      'meta+s'
-    );
-    this.bindShortcut(Shortcut.OPEN_DIFF_PREFS, ',');
-    this.bindShortcut(Shortcut.TOGGLE_DIFF_REVIEWED, 'r:keyup');
-
-    this.bindShortcut(Shortcut.NEXT_FILE, ']');
-    this.bindShortcut(Shortcut.PREV_FILE, '[');
-    this.bindShortcut(Shortcut.NEXT_FILE_WITH_COMMENTS, 'shift+j');
-    this.bindShortcut(Shortcut.PREV_FILE_WITH_COMMENTS, 'shift+k');
-    this.bindShortcut(Shortcut.CURSOR_NEXT_FILE, 'j', 'down');
-    this.bindShortcut(Shortcut.CURSOR_PREV_FILE, 'k', 'up');
-    this.bindShortcut(Shortcut.OPEN_FILE, 'o', 'enter');
-    this.bindShortcut(Shortcut.TOGGLE_FILE_REVIEWED, 'r:keyup');
-    this.bindShortcut(Shortcut.NEXT_UNREVIEWED_FILE, 'shift+m');
-    this.bindShortcut(Shortcut.TOGGLE_ALL_INLINE_DIFFS, 'shift+i');
-    this.bindShortcut(Shortcut.TOGGLE_INLINE_DIFF, 'i');
-    this.bindShortcut(Shortcut.TOGGLE_BLAME, 'b:keyup');
-    this.bindShortcut(Shortcut.TOGGLE_HIDE_ALL_COMMENT_THREADS, 'h');
-    this.bindShortcut(Shortcut.OPEN_FILE_LIST, 'f');
-
-    this.bindShortcut(Shortcut.OPEN_FIRST_FILE, ']');
-    this.bindShortcut(Shortcut.OPEN_LAST_FILE, '[');
-
-    this.bindShortcut(Shortcut.SEARCH, '/');
-  }
-
-  _isCursorManagerSupportMoveToVisibleLine() {
-    // This method is a copy-paste from the
-    // method _isIntersectionObserverSupported of gr-cursor-manager.js
-    // It is better share this method with gr-cursor-manager,
-    // but doing it require a lot if changes instead of 1-line copied code
-    return 'IntersectionObserver' in window;
-  }
-
   _accountChanged(account?: AccountDetailInfo) {
     if (!account) return;
 
@@ -655,7 +502,8 @@
     (this.shadowRoot!.querySelector('#keyboardShortcuts') as GrOverlay).open();
   }
 
-  _showKeyboardShortcuts(e: CustomKeyboardEvent) {
+  _showKeyboardShortcuts(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) return;
     // same shortcut should close the dialog if pressed again
     // when dialog is open
     this.loadKeyboardShortcutsDialog = true;
@@ -668,9 +516,6 @@
       keyboardShortcuts.cancel();
       return;
     }
-    if (this.shouldSuppressKeyboardShortcut(e)) {
-      return;
-    }
     keyboardShortcuts.open();
     this._footerHeaderAriaHidden = true;
     this._mainAriaHidden = true;
diff --git a/polygerrit-ui/app/elements/plugins/gr-popup-interface/gr-popup-interface.ts b/polygerrit-ui/app/elements/plugins/gr-popup-interface/gr-popup-interface.ts
index 8ed6611..45a93bf 100644
--- a/polygerrit-ui/app/elements/plugins/gr-popup-interface/gr-popup-interface.ts
+++ b/polygerrit-ui/app/elements/plugins/gr-popup-interface/gr-popup-interface.ts
@@ -51,6 +51,11 @@
     return dom(this.popup) as unknown as HTMLElement;
   }
 
+  appendContent(el: HTMLElement) {
+    if (!this.popup) throw new Error('popup element not (yet) available');
+    this.popup.appendChild(el);
+  }
+
   /**
    * Opens the popup, inserts it into DOM over current UI.
    * Creates the popup if not previously created. Creates popup content element,
diff --git a/polygerrit-ui/app/elements/settings/gr-account-info/gr-account-info.ts b/polygerrit-ui/app/elements/settings/gr-account-info/gr-account-info.ts
index 536beb4..bd6835c 100644
--- a/polygerrit-ui/app/elements/settings/gr-account-info/gr-account-info.ts
+++ b/polygerrit-ui/app/elements/settings/gr-account-info/gr-account-info.ts
@@ -26,7 +26,6 @@
 import {EditableAccountField} from '../../../constants/constants';
 import {appContext} from '../../../services/app-context';
 import {fireEvent} from '../../../utils/event-util';
-import {KeydownEvent} from '../../../types/events';
 
 @customElement('gr-account-info')
 export class GrAccountInfo extends PolymerElement {
@@ -247,7 +246,7 @@
     this._hasNameChange = true;
   }
 
-  _handleKeydown(e: KeydownEvent) {
+  _handleKeydown(e: KeyboardEvent) {
     if (e.keyCode === 13) {
       // Enter
       e.stopPropagation();
diff --git a/polygerrit-ui/app/elements/settings/gr-http-password/gr-http-password.ts b/polygerrit-ui/app/elements/settings/gr-http-password/gr-http-password.ts
index c62cff4..59f6a39 100644
--- a/polygerrit-ui/app/elements/settings/gr-http-password/gr-http-password.ts
+++ b/polygerrit-ui/app/elements/settings/gr-http-password/gr-http-password.ts
@@ -115,7 +115,7 @@
 
   override render() {
     return html` <div class="gr-form-styles">
-        <div ?hidden=${this._passwordUrl}>
+        <div ?hidden=${!!this._passwordUrl}>
           <section>
             <span class="title">Username</span>
             <span class="value">${this._username ?? ''}</span>
@@ -125,7 +125,7 @@
           >
         </div>
         <span ?hidden=${!this._passwordUrl}>
-          <a href="${this._passwordUrl}" target="_blank" rel="noopener">
+          <a href="${this._passwordUrl!}" target="_blank" rel="noopener">
             Obtain password</a
           >
           (opens in a new tab)
@@ -134,7 +134,7 @@
       <gr-overlay
         id="generatedPasswordOverlay"
         @iron-overlay-closed=${this._generatedPasswordOverlayClosed}
-        with-backdrop=""
+        with-backdrop
       >
         <div class="gr-form-styles">
           <section id="generatedPasswordDisplay">
diff --git a/polygerrit-ui/app/elements/settings/gr-menu-editor/gr-menu-editor.ts b/polygerrit-ui/app/elements/settings/gr-menu-editor/gr-menu-editor.ts
index 4096b02..c392a13 100644
--- a/polygerrit-ui/app/elements/settings/gr-menu-editor/gr-menu-editor.ts
+++ b/polygerrit-ui/app/elements/settings/gr-menu-editor/gr-menu-editor.ts
@@ -23,7 +23,6 @@
 import {htmlTemplate} from './gr-menu-editor_html';
 import {customElement, property} from '@polymer/decorators';
 import {TopMenuItemInfo} from '../../../types/common';
-import {KeydownEvent} from '../../../types/events';
 
 @customElement('gr-menu-editor')
 export class GrMenuEditor extends PolymerElement {
@@ -90,7 +89,7 @@
     return !newName?.length || !newUrl?.length;
   }
 
-  _handleInputKeydown(e: KeydownEvent) {
+  _handleInputKeydown(e: KeyboardEvent) {
     if (e.keyCode === 13) {
       e.stopPropagation();
       this._handleAddButton();
diff --git a/polygerrit-ui/app/elements/settings/gr-settings-view/gr-settings-view.ts b/polygerrit-ui/app/elements/settings/gr-settings-view/gr-settings-view.ts
index 94333c7..3533fd6 100644
--- a/polygerrit-ui/app/elements/settings/gr-settings-view/gr-settings-view.ts
+++ b/polygerrit-ui/app/elements/settings/gr-settings-view/gr-settings-view.ts
@@ -62,7 +62,6 @@
 import {GrSshEditor} from '../gr-ssh-editor/gr-ssh-editor';
 import {GrGpgEditor} from '../gr-gpg-editor/gr-gpg-editor';
 import {GrEmailEditor} from '../gr-email-editor/gr-email-editor';
-import {KeydownEvent} from '../../../types/events';
 import {fireAlert, fireTitleChange} from '../../../utils/event-util';
 import {appContext} from '../../../services/app-context';
 import {GerritView} from '../../../services/router/router-model';
@@ -489,7 +488,7 @@
     this.$.emailEditor.save();
   }
 
-  _handleNewEmailKeydown(e: KeydownEvent) {
+  _handleNewEmailKeydown(e: KeyboardEvent) {
     if (e.keyCode === 13) {
       // Enter
       e.stopPropagation();
diff --git a/polygerrit-ui/app/elements/shared/gr-account-link/gr-account-link.ts b/polygerrit-ui/app/elements/shared/gr-account-link/gr-account-link.ts
index fbf29c63..f0c9106 100644
--- a/polygerrit-ui/app/elements/shared/gr-account-link/gr-account-link.ts
+++ b/polygerrit-ui/app/elements/shared/gr-account-link/gr-account-link.ts
@@ -20,6 +20,7 @@
 import {AccountInfo, ChangeInfo} from '../../../types/common';
 import {LitElement, css, html} from 'lit';
 import {customElement, property} from 'lit/decorators';
+import {ParsedChangeInfo} from '../../../types/types';
 
 @customElement('gr-account-link')
 export class GrAccountLink extends LitElement {
@@ -35,7 +36,7 @@
    * related features like adding the user as a reviewer.
    */
   @property({type: Object})
-  change?: ChangeInfo;
+  change?: ChangeInfo | ParsedChangeInfo;
 
   /**
    * Should this user be considered to be in the attention set, regardless
diff --git a/polygerrit-ui/app/elements/shared/gr-account-list/gr-account-list.ts b/polygerrit-ui/app/elements/shared/gr-account-list/gr-account-list.ts
index c5d1f03..d97e38e 100644
--- a/polygerrit-ui/app/elements/shared/gr-account-list/gr-account-list.ts
+++ b/polygerrit-ui/app/elements/shared/gr-account-list/gr-account-list.ts
@@ -39,7 +39,6 @@
 import {PaperInputElementExt} from '../../../types/types';
 import {fireAlert} from '../../../utils/event-util';
 import {accountOrGroupKey} from '../../../utils/account-util';
-import {KeydownEvent} from '../../../types/events';
 
 const VALID_EMAIL_ALERT = 'Please input a valid email.';
 
@@ -360,7 +359,7 @@
     }
   }
 
-  _handleChipKeydown(e: KeydownEvent) {
+  _handleChipKeydown(e: KeyboardEvent) {
     const chip = e.target as GrAccountChip;
     const chips = this.accountChips;
     const index = chips.indexOf(chip);
diff --git a/polygerrit-ui/app/elements/shared/gr-alert/gr-alert.ts b/polygerrit-ui/app/elements/shared/gr-alert/gr-alert.ts
index ae3853e..6036a99 100644
--- a/polygerrit-ui/app/elements/shared/gr-alert/gr-alert.ts
+++ b/polygerrit-ui/app/elements/shared/gr-alert/gr-alert.ts
@@ -78,6 +78,7 @@
           font-weight: var(--font-weight-bold);
           margin-left: var(--spacing-l);
           text-decoration: none;
+          --gr-button-padding: 0;
         }
       `,
     ];
@@ -94,18 +95,8 @@
   }
 
   override render() {
-    // To pass CSS mixins for @apply to Polymer components, they need to appear
-    // in <style> inside the template.
-    /* eslint-disable lit/prefer-static-styles */
-    const style = html`<style>
-      .action {
-        --gr-button: {
-          padding: 0;
-        }
-      }
-    </style>`;
     const {text, actionText} = this;
-    return html`${style}
+    return html`
       <div class="content-wrapper">
         <span class="text">${text}</span>
         <gr-button
@@ -116,7 +107,8 @@
           >${actionText}
         </gr-button>
         ${this.renderDismissButton()}
-      </div> `;
+      </div>
+    `;
   }
 
   /**
diff --git a/polygerrit-ui/app/elements/shared/gr-autocomplete/gr-autocomplete.ts b/polygerrit-ui/app/elements/shared/gr-autocomplete/gr-autocomplete.ts
index 9918f39..524b197 100644
--- a/polygerrit-ui/app/elements/shared/gr-autocomplete/gr-autocomplete.ts
+++ b/polygerrit-ui/app/elements/shared/gr-autocomplete/gr-autocomplete.ts
@@ -26,10 +26,10 @@
 import {property, customElement, observe} from '@polymer/decorators';
 import {GrAutocompleteDropdown} from '../gr-autocomplete-dropdown/gr-autocomplete-dropdown';
 import {PaperInputElementExt} from '../../../types/types';
-import {CustomKeyboardEvent} from '../../../types/events';
 import {fireEvent} from '../../../utils/event-util';
 import {debounce, DelayedTask} from '../../../utils/async-util';
 import {PropertyType} from '../../../types/common';
+import {modifierPressed} from '../../../utils/dom-util';
 
 const TOKENIZE_REGEX = /(?:[^\s"]+|"[^"]*")+/g;
 const DEBOUNCE_WAIT_MS = 200;
@@ -358,7 +358,7 @@
    * _handleKeydown used for key handling in the this.$.input AND all child
    * autocomplete options.
    */
-  _handleKeydown(e: CustomKeyboardEvent) {
+  _handleKeydown(e: KeyboardEvent) {
     this._focused = true;
     switch (e.keyCode) {
       case 38: // Up
@@ -383,7 +383,7 @@
         }
         break;
       case 13: // Enter
-        if (this.modifierPressed(e)) {
+        if (modifierPressed(e)) {
           break;
         }
         e.preventDefault();
diff --git a/polygerrit-ui/app/elements/shared/gr-button/gr-button.ts b/polygerrit-ui/app/elements/shared/gr-button/gr-button.ts
index f7ebd66..8dc23e2 100644
--- a/polygerrit-ui/app/elements/shared/gr-button/gr-button.ts
+++ b/polygerrit-ui/app/elements/shared/gr-button/gr-button.ts
@@ -19,14 +19,9 @@
 import {votingStyles} from '../../../styles/gr-voting-styles';
 import {css, html, LitElement, PropertyValues} from 'lit';
 import {customElement, property} from 'lit/decorators';
-import {
-  getEventPath,
-  getKeyboardEvent,
-  isModifierPressed,
-} from '../../../utils/dom-util';
+import {getEventPath, modifierPressed} from '../../../utils/dom-util';
 import {appContext} from '../../../services/app-context';
 import {ReportingService} from '../../../services/gr-reporting/gr-reporting';
-import {CustomKeyboardEvent} from '../../../types/events';
 
 declare global {
   interface HTMLElementTagNameMap {
@@ -49,7 +44,7 @@
   // after created, the initial value maybe overridden by this
   private initialTabindex?: string;
 
-  @property({type: Boolean, reflect: true})
+  @property({type: Boolean, reflect: true, attribute: 'down-arrow'})
   downArrow = false;
 
   @property({type: Boolean, reflect: true})
@@ -72,7 +67,10 @@
             --button-background-color,
             var(--default-button-background-color)
           );
-          --text-color: var(--default-button-text-color);
+          --text-color: var(
+            --gr-button-text-color,
+            var(--default-button-text-color)
+          );
           display: inline-block;
           position: relative;
         }
@@ -83,40 +81,6 @@
           text-transform: none;
         }
         paper-button {
-          /* The next lines contains a copy of paper-button style.
-            Without a copy, the @apply works incorrectly with Polymer 2.
-            @apply is deprecated and is not recommended to use. It is expected
-            that @apply will be replaced with the ::part CSS pseudo-element.
-            After replacement copied lines can be removed.
-          */
-          @apply --layout-inline;
-          @apply --layout-center-center;
-          position: relative;
-          box-sizing: border-box;
-          min-width: 5.14em;
-          margin: 0 0.29em;
-          background: transparent;
-          -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
-          -webkit-tap-highlight-color: transparent;
-          font: inherit;
-          text-transform: uppercase;
-          outline-width: 0;
-          border-top-left-radius: var(--border-radius);
-          border-top-right-radius: var(--border-radius);
-          border-bottom-right-radius: var(--border-radius);
-          border-bottom-left-radius: var(--border-radius);
-          -moz-user-select: none;
-          -ms-user-select: none;
-          -webkit-user-select: none;
-          user-select: none;
-          cursor: pointer;
-          z-index: 0;
-          padding: var(--spacing-m);
-
-          @apply --paper-font-common-base;
-          @apply --paper-button;
-          /* End of copy*/
-
           /* paper-button sets this to anti-aliased, which appears different than
             bold font elsewhere on macOS. */
           -webkit-font-smoothing: initial;
@@ -128,27 +92,23 @@
           justify-content: center;
           margin: var(--margin, 0);
           min-width: var(--border, 0);
-          padding: var(--padding, 4px 8px);
-          @apply --gr-button;
+          padding: var(--gr-button-padding, var(--spacing-s) var(--spacing-m));
         }
-        /* https://github.com/PolymerElements/paper-button/blob/2.x/paper-button.html */
-        /* BEGIN: Copy from paper-button */
         paper-button[elevation='1'] {
-          @apply --paper-material-elevation-1;
+          box-shadow: var(--elevation-level-1);
         }
         paper-button[elevation='2'] {
-          @apply --paper-material-elevation-2;
+          box-shadow: var(--elevation-level-2);
         }
         paper-button[elevation='3'] {
-          @apply --paper-material-elevation-3;
+          box-shadow: var(--elevation-level-3);
         }
         paper-button[elevation='4'] {
-          @apply --paper-material-elevation-4;
+          box-shadow: var(--elevation-level-4);
         }
         paper-button[elevation='5'] {
-          @apply --paper-material-elevation-5;
+          box-shadow: var(--elevation-level-5);
         }
-        /* END: Copy from paper-button */
         paper-button:hover {
           background: linear-gradient(rgba(0, 0, 0, 0.12), rgba(0, 0, 0, 0.12)),
             var(--background-color);
@@ -192,7 +152,9 @@
         :host([link]) {
           --background-color: transparent;
           --margin: 0;
-          --padding: var(--spacing-s);
+        }
+        :host([link]) paper-button {
+          padding: var(--gr-button-padding, var(--spacing-s));
         }
         :host([disabled][link]),
         :host([loading][link]) {
@@ -239,9 +201,7 @@
     super();
     this.initialTabindex = this.getAttribute('tabindex') || '0';
     this.addEventListener('click', e => this._handleAction(e));
-    this.addEventListener('keydown', e =>
-      this._handleKeydown(e as unknown as CustomKeyboardEvent)
-    );
+    this.addEventListener('keydown', e => this._handleKeydown(e));
   }
 
   override updated(changedProperties: PropertyValues) {
@@ -280,11 +240,8 @@
     this.reporting.reportInteraction('button-click', {path: getEventPath(e)});
   }
 
-  _handleKeydown(e: CustomKeyboardEvent) {
-    if (isModifierPressed(e)) {
-      return;
-    }
-    e = getKeyboardEvent(e);
+  _handleKeydown(e: KeyboardEvent) {
+    if (modifierPressed(e)) return;
     // Handle `enter`, `space`.
     if (e.keyCode === 13 || e.keyCode === 32) {
       e.preventDefault();
diff --git a/polygerrit-ui/app/elements/shared/gr-change-star/gr-change-star.ts b/polygerrit-ui/app/elements/shared/gr-change-star/gr-change-star.ts
index 5069ba4..a23621e 100644
--- a/polygerrit-ui/app/elements/shared/gr-change-star/gr-change-star.ts
+++ b/polygerrit-ui/app/elements/shared/gr-change-star/gr-change-star.ts
@@ -21,6 +21,11 @@
 import {customElement, property} from '@polymer/decorators';
 import {ChangeInfo} from '../../../types/common';
 import {fireAlert} from '../../../utils/event-util';
+import {
+  Shortcut,
+  ShortcutSection,
+} from '../../../services/shortcuts/shortcuts-config';
+import {appContext} from '../../../services/app-context';
 
 declare global {
   interface HTMLElementTagNameMap {
@@ -48,6 +53,8 @@
   @property({type: Object, notify: true})
   change?: ChangeInfo;
 
+  private readonly shortcuts = appContext.shortcutsService;
+
   _computeStarClass(starred?: boolean) {
     return starred ? 'active' : '';
   }
@@ -83,4 +90,8 @@
       })
     );
   }
+
+  createTitle(shortcutName: Shortcut, section: ShortcutSection) {
+    return this.shortcuts.createTitle(shortcutName, section);
+  }
 }
diff --git a/polygerrit-ui/app/elements/shared/gr-comment-thread/gr-comment-thread.ts b/polygerrit-ui/app/elements/shared/gr-comment-thread/gr-comment-thread.ts
index bc41f98..f1b74ac 100644
--- a/polygerrit-ui/app/elements/shared/gr-comment-thread/gr-comment-thread.ts
+++ b/polygerrit-ui/app/elements/shared/gr-comment-thread/gr-comment-thread.ts
@@ -18,6 +18,7 @@
 import '../../../styles/shared-styles';
 import '../gr-comment/gr-comment';
 import '../../diff/gr-diff/gr-diff';
+import '../gr-copy-clipboard/gr-copy-clipboard';
 import {PolymerElement} from '@polymer/polymer/polymer-element';
 import {htmlTemplate} from './gr-comment-thread_html';
 import {KeyboardShortcutMixin} from '../../../mixins/keyboard-shortcut-mixin/keyboard-shortcut-mixin';
@@ -53,12 +54,12 @@
 } from '../../../types/common';
 import {GrComment} from '../gr-comment/gr-comment';
 import {PolymerDeepPropertyChange} from '@polymer/polymer/interfaces';
-import {CustomKeyboardEvent} from '../../../types/events';
+import {IronKeyboardEvent} from '../../../types/events';
 import {LineNumber, FILE} from '../../diff/gr-diff/gr-diff-line';
 import {GrButton} from '../gr-button/gr-button';
 import {KnownExperimentId} from '../../../services/flags/flags';
 import {DiffInfo, DiffPreferencesInfo} from '../../../types/diff';
-import {RenderPreferences} from '../../../api/diff';
+import {DiffLayer, RenderPreferences} from '../../../api/diff';
 import {
   check,
   assertIsDefined,
@@ -206,8 +207,8 @@
   @property({type: Object})
   _selfAccount?: AccountDetailInfo;
 
-  @property({type: Boolean})
-  disableTokenHighlighting = false;
+  @property({type: Array})
+  layers: DiffLayer[] = [];
 
   get keyBindings() {
     return {
@@ -227,15 +228,15 @@
 
   readonly restApiService = appContext.restApiService;
 
+  private readonly shortcuts = appContext.shortcutsService;
+
   constructor() {
     super();
     this.addEventListener('comment-update', e =>
       this._handleCommentUpdate(e as CustomEvent)
     );
     appContext.restApiService.getPreferences().then(prefs => {
-      if (prefs?.disable_token_highlighting) {
-        this.disableTokenHighlighting = prefs.disable_token_highlighting;
-      }
+      this._initLayers(!!prefs?.disable_token_highlighting);
     });
   }
 
@@ -352,7 +353,8 @@
     return GerritNav.getUrlForComment(changeNum, projectName, id);
   }
 
-  getHighlightRange() {
+  /** The parameter is for triggering re-computation only. */
+  getHighlightRange(_: unknown) {
     const comment = this.comments?.[0];
     if (!comment) return undefined;
     if (comment.range) return comment.range;
@@ -367,26 +369,23 @@
     return undefined;
   }
 
-  _getLayers(diff?: DiffInfo) {
-    if (!diff) return [];
-    const layers = [];
+  _initLayers(disableTokenHighlighting: boolean) {
     if (
       this.flagsService.isEnabled(KnownExperimentId.TOKEN_HIGHLIGHTING) &&
-      !this.disableTokenHighlighting
+      !disableTokenHighlighting
     ) {
-      layers.push(new TokenHighlightLayer(this));
+      this.layers.push(new TokenHighlightLayer(this));
     }
-    layers.push(this.syntaxLayer);
-    return layers;
+    this.layers.push(this.syntaxLayer);
   }
 
   _getUrlForViewDiff(
     comments: UIComment[],
     changeNum?: NumericChangeId,
     projectName?: RepoName
-  ) {
-    if (!changeNum) return;
-    if (!projectName) return;
+  ): string {
+    if (!changeNum) return '';
+    if (!projectName) return '';
     check(comments.length > 0, 'comment not found');
     return GerritNav.getUrlForComment(changeNum, projectName, comments[0].id!);
   }
@@ -432,7 +431,7 @@
     });
   }
 
-  _isPatchsetLevelComment(path: string) {
+  _isPatchsetLevelComment(path?: string) {
     return path === SpecialFilePath.PATCHSET_LEVEL_COMMENTS;
   }
 
@@ -441,7 +440,7 @@
     return this.showPortedComment && comment.id === this._orderedComments[0].id;
   }
 
-  _computeDisplayPath(path: string) {
+  _computeDisplayPath(path?: string) {
     const displayPath = computeDisplayPath(path);
     if (displayPath === SpecialFilePath.PATCHSET_LEVEL_COMMENTS) {
       return 'Patchset';
@@ -500,8 +499,8 @@
     return this._orderedComments[this._orderedComments.length - 1] || {};
   }
 
-  _handleEKey(e: CustomKeyboardEvent) {
-    if (this.shouldSuppressKeyboardShortcut(e)) {
+  _handleEKey(e: IronKeyboardEvent) {
+    if (this.shortcuts.shouldSuppress(e)) {
       return;
     }
 
@@ -756,7 +755,8 @@
     return -1;
   }
 
-  _computeHostClass(unresolved?: boolean) {
+  /** 2nd parameter is for triggering re-computation only. */
+  _computeHostClass(unresolved?: boolean, _?: unknown) {
     if (this.isRobotComment) {
       return 'robotComment';
     }
diff --git a/polygerrit-ui/app/elements/shared/gr-comment-thread/gr-comment-thread_html.ts b/polygerrit-ui/app/elements/shared/gr-comment-thread/gr-comment-thread_html.ts
index 0752a82..c3faaa5 100644
--- a/polygerrit-ui/app/elements/shared/gr-comment-thread/gr-comment-thread_html.ts
+++ b/polygerrit-ui/app/elements/shared/gr-comment-thread/gr-comment-thread_html.ts
@@ -116,6 +116,16 @@
       top: 4px;
       cursor: pointer;
     }
+    .fileName gr-copy-clipboard {
+      display: inline-block;
+      visibility: hidden;
+      vertical-align: top;
+      --gr-button-padding: 0px;
+    }
+    .fileName:focus-within gr-copy-clipboard,
+    .fileName:hover gr-copy-clipboard {
+      visibility: visible;
+    }
   </style>
 
   <template is="dom-if" if="[[showFilePath]]">
@@ -130,6 +140,10 @@
           >
             [[_computeDisplayPath(path)]]
           </a>
+          <gr-copy-clipboard
+            hideInput=""
+            text="[[_computeDisplayPath(path)]]"
+          ></gr-copy-clipboard>
         </template>
       </div>
     </template>
@@ -232,7 +246,7 @@
           id="diff"
           change-num="[[changeNum]]"
           diff="[[_diff]]"
-          layers="[[_getLayers(_diff)]]"
+          layers="[[layers]]"
           path="[[path]]"
           prefs="[[_prefs]]"
           render-prefs="[[_renderPrefs]]"
@@ -241,9 +255,7 @@
         </gr-diff>
         <div class="view-diff-container">
           <a href="[[_getUrlForViewDiff(comments, changeNum, projectName)]]">
-            <gr-button link class="view-diff-button" on-click="_handleViewDiff">
-              View Diff
-            </gr-button>
+            <gr-button link class="view-diff-button">View Diff</gr-button>
           </a>
         </div>
       </div>
diff --git a/polygerrit-ui/app/elements/shared/gr-comment/gr-comment.ts b/polygerrit-ui/app/elements/shared/gr-comment/gr-comment.ts
index fa04860..0d4ad8c 100644
--- a/polygerrit-ui/app/elements/shared/gr-comment/gr-comment.ts
+++ b/polygerrit-ui/app/elements/shared/gr-comment/gr-comment.ts
@@ -49,6 +49,7 @@
 import {GrConfirmDeleteCommentDialog} from '../gr-confirm-delete-comment-dialog/gr-confirm-delete-comment-dialog';
 import {
   isDraft,
+  isRobot,
   UIComment,
   UIDraft,
   UIRobot,
@@ -214,7 +215,7 @@
   projectConfig?: ConfigInfo;
 
   @property({type: Boolean})
-  robotButtonDisabled?: boolean;
+  robotButtonDisabled = false;
 
   @property({type: Boolean})
   _hasHumanReply?: boolean;
@@ -233,7 +234,7 @@
   side?: string;
 
   @property({type: Boolean})
-  resolved?: boolean;
+  resolved = false;
 
   // Intentional to share the object across instances.
   @property({type: Object})
@@ -318,12 +319,13 @@
     super.disconnectedCallback();
   }
 
-  _getAuthor(comment: UIComment) {
-    return comment.author || this._selfAccount;
+  /** 2nd argument is for *triggering* the computation only. */
+  _getAuthor(comment?: UIComment, _?: unknown) {
+    return comment?.author || this._selfAccount;
   }
 
-  _getUrlForComment(comment: UIComment) {
-    if (!this.changeNum || !this.projectName) return '';
+  _getUrlForComment(comment?: UIComment) {
+    if (!comment || !this.changeNum || !this.projectName) return '';
     if (!comment.id) throw new Error('comment must have an id');
     return GerritNav.getUrlForComment(
       this.changeNum as NumericChangeId,
@@ -435,8 +437,8 @@
     this._showRobotActions = showActions && isRobotComment;
   }
 
-  hasPublishedComment(comments: UIComment[]) {
-    if (!comments.length) return false;
+  hasPublishedComment(comments?: UIComment[]) {
+    if (!comments?.length) return false;
     return comments.length > 1 || !isDraft(comments[0]);
   }
 
@@ -808,7 +810,7 @@
     );
   }
 
-  _hasNoFix(comment: UIComment) {
+  _hasNoFix(comment?: UIComment) {
     return !comment || !(comment as UIRobot).fix_suggestions;
   }
 
@@ -1037,9 +1039,10 @@
     return overlay.open();
   }
 
-  _computeHideRunDetails(comment: UIRobot, collapsed: boolean) {
+  _computeHideRunDetails(comment: UIComment | undefined, collapsed: boolean) {
     if (!comment) return true;
-    return !(comment.robot_id && comment.url && !collapsed);
+    if (!isRobot(comment)) return true;
+    return !comment.url || collapsed;
   }
 
   _closeOverlay(overlay?: GrOverlay | null) {
diff --git a/polygerrit-ui/app/elements/shared/gr-comment/gr-comment_html.ts b/polygerrit-ui/app/elements/shared/gr-comment/gr-comment_html.ts
index d1496fb..b77c4b2 100644
--- a/polygerrit-ui/app/elements/shared/gr-comment/gr-comment_html.ts
+++ b/polygerrit-ui/app/elements/shared/gr-comment/gr-comment_html.ts
@@ -89,10 +89,7 @@
       justify-content: flex-end;
     }
     .rightActions gr-button {
-      --gr-button: {
-        height: 20px;
-        padding: 0 var(--spacing-s);
-      }
+      --gr-button-padding: 0 var(--spacing-s);
     }
     .editMessage {
       display: none;
@@ -190,10 +187,8 @@
     }
     #deleteBtn {
       display: none;
-      --gr-button: {
-        color: var(--deemphasized-text-color);
-        padding: 0;
-      }
+      --gr-button-text-color: var(--deemphasized-text-color);
+      --gr-button-padding: 0;
     }
     #deleteBtn.showDeleteButtons {
       display: block;
@@ -321,7 +316,7 @@
       <div class="show-hide" tabindex="0">
         <label
           class="show-hide"
-          aria-label="[[_computeShowHideAriaLabel(collapsed)]]"
+          aria-label$="[[_computeShowHideAriaLabel(collapsed)]]"
         >
           <input
             type="checkbox"
diff --git a/polygerrit-ui/app/elements/shared/gr-copy-clipboard/gr-copy-clipboard.ts b/polygerrit-ui/app/elements/shared/gr-copy-clipboard/gr-copy-clipboard.ts
index 0cd522a..01422a9 100644
--- a/polygerrit-ui/app/elements/shared/gr-copy-clipboard/gr-copy-clipboard.ts
+++ b/polygerrit-ui/app/elements/shared/gr-copy-clipboard/gr-copy-clipboard.ts
@@ -81,36 +81,24 @@
         iron-icon {
           color: var(--deemphasized-text-color);
           vertical-align: top;
+          --iron-icon-height: 20px;
+          --iron-icon-width: 20px;
+        }
+        gr-button {
+          display: block;
+          --gr-button-padding: 2px;
         }
       `,
     ];
   }
 
   override render() {
-    // To pass CSS mixins for @apply to Polymer components, they need to appear
-    // in <style> inside the template.
-    /* eslint-disable lit/prefer-static-styles */
-    const customStyle = html`
-      <style>
-        iron-icon {
-          --iron-icon-height: 20px;
-          --iron-icon-width: 20px;
-        }
-        gr-button {
-          --gr-button: {
-            padding: 2px;
-          }
-        }
-      </style>
-    `;
-    return html`${customStyle}
+    return html`
       <div class="text">
         <iron-input
           class="copyText"
-          type="text"
           @click="${this._handleInputClick}"
-          readonly=""
-          bind-value=${this.text || ''}
+          .bindValue=${this.text ?? ''}
         >
           <input
             id="input"
@@ -119,7 +107,7 @@
             type="text"
             @click="${this._handleInputClick}"
             readonly=""
-            .value=${this.text || ''}
+            .value=${this.text ?? ''}
             part="text-container-style"
           />
         </iron-input>
@@ -137,7 +125,8 @@
             <iron-icon id="icon" icon="gr-icons:content-copy"></iron-icon>
           </gr-button>
         </gr-tooltip-content>
-      </div> `;
+      </div>
+    `;
   }
 
   focusOnCopy() {
diff --git a/polygerrit-ui/app/elements/shared/gr-cursor-manager/gr-cursor-manager.ts b/polygerrit-ui/app/elements/shared/gr-cursor-manager/gr-cursor-manager.ts
index 9dce127..9f65dd4 100644
--- a/polygerrit-ui/app/elements/shared/gr-cursor-manager/gr-cursor-manager.ts
+++ b/polygerrit-ui/app/elements/shared/gr-cursor-manager/gr-cursor-manager.ts
@@ -179,9 +179,6 @@
   private async getVisibleEntries(
     filter?: (el: Element) => boolean
   ): Promise<IntersectionObserverEntry[]> {
-    if (!this._isIntersectionObserverSupported()) {
-      throw new Error('Intersection observing not supported');
-    }
     if (!this.stops) {
       return [];
     }
@@ -218,14 +215,6 @@
     });
   }
 
-  _isIntersectionObserverSupported() {
-    // The copy of this method exists in gr-app-element.js under the
-    // name _isCursorManagerSupportMoveToVisibleLine
-    // If you update this method, you must update gr-app-element.js
-    // as well.
-    return 'IntersectionObserver' in window;
-  }
-
   /**
    * Set the cursor to an arbitrary stop - if the given element is not one of
    * the stops, unset the cursor.
diff --git a/polygerrit-ui/app/elements/shared/gr-dialog/gr-dialog.ts b/polygerrit-ui/app/elements/shared/gr-dialog/gr-dialog.ts
index 27c6341..74e34a0 100644
--- a/polygerrit-ui/app/elements/shared/gr-dialog/gr-dialog.ts
+++ b/polygerrit-ui/app/elements/shared/gr-dialog/gr-dialog.ts
@@ -21,7 +21,6 @@
 import {htmlTemplate} from './gr-dialog_html';
 import {customElement, property, observe} from '@polymer/decorators';
 import {GrButton} from '../gr-button/gr-button';
-import {KeydownEvent} from '../../../types/events';
 
 declare global {
   interface HTMLElementTagNameMap {
@@ -109,7 +108,7 @@
     );
   }
 
-  _handleKeydown(e: KeydownEvent) {
+  _handleKeydown(e: KeyboardEvent) {
     if (this.confirmOnEnter && e.keyCode === 13) {
       this._handleConfirm(e);
     }
diff --git a/polygerrit-ui/app/elements/shared/gr-dropdown-list/gr-dropdown-list.ts b/polygerrit-ui/app/elements/shared/gr-dropdown-list/gr-dropdown-list.ts
index ef46cec..6180f35 100644
--- a/polygerrit-ui/app/elements/shared/gr-dropdown-list/gr-dropdown-list.ts
+++ b/polygerrit-ui/app/elements/shared/gr-dropdown-list/gr-dropdown-list.ts
@@ -88,7 +88,7 @@
   disabled = false;
 
   @property({type: String, notify: true})
-  value?: string;
+  value: string | number = '';
 
   @property({type: Boolean})
   showCopyForTriggerText = false;
@@ -122,6 +122,10 @@
     return item.mobileText ? item.mobileText : item.text;
   }
 
+  computeStringValue(val: string | number) {
+    return String(val);
+  }
+
   @observe('value', 'items')
   _handleValueChange(value?: string, items?: DropdownItem[]) {
     if (!value || !items) {
diff --git a/polygerrit-ui/app/elements/shared/gr-dropdown-list/gr-dropdown-list_html.ts b/polygerrit-ui/app/elements/shared/gr-dropdown-list/gr-dropdown-list_html.ts
index 9ec1d39..3875871 100644
--- a/polygerrit-ui/app/elements/shared/gr-dropdown-list/gr-dropdown-list_html.ts
+++ b/polygerrit-ui/app/elements/shared/gr-dropdown-list/gr-dropdown-list_html.ts
@@ -78,9 +78,8 @@
       width: 100%;
     }
     gr-button {
-      --gr-button: {
-        @apply --trigger-style;
-      }
+      font-family: var(--trigger-style-font-family);
+      --gr-button-text-color: var(--trigger-style-text-color);
     }
     gr-date-formatter {
       color: var(--deemphasized-text-color);
@@ -174,7 +173,10 @@
   <gr-select bind-value="{{value}}">
     <select>
       <template is="dom-repeat" items="[[items]]">
-        <option disabled$="[[item.disabled]]" value="[[item.value]]">
+        <option
+          disabled$="[[item.disabled]]"
+          value="[[computeStringValue(item.value)]]"
+        >
           [[_computeMobileText(item)]]
         </option>
       </template>
diff --git a/polygerrit-ui/app/elements/shared/gr-dropdown/gr-dropdown_html.ts b/polygerrit-ui/app/elements/shared/gr-dropdown/gr-dropdown_html.ts
index 4bd98d6..3c07d94 100644
--- a/polygerrit-ui/app/elements/shared/gr-dropdown/gr-dropdown_html.ts
+++ b/polygerrit-ui/app/elements/shared/gr-dropdown/gr-dropdown_html.ts
@@ -33,7 +33,6 @@
     }
     gr-button {
       vertical-align: top;
-      @apply --gr-button;
     }
     gr-avatar {
       height: 2em;
diff --git a/polygerrit-ui/app/elements/shared/gr-editable-label/gr-editable-label.ts b/polygerrit-ui/app/elements/shared/gr-editable-label/gr-editable-label.ts
index bd1046f..13b195e 100644
--- a/polygerrit-ui/app/elements/shared/gr-editable-label/gr-editable-label.ts
+++ b/polygerrit-ui/app/elements/shared/gr-editable-label/gr-editable-label.ts
@@ -26,12 +26,11 @@
 import {IronDropdownElement} from '@polymer/iron-dropdown/iron-dropdown';
 import {dom, EventApi} from '@polymer/polymer/lib/legacy/polymer.dom';
 import {PaperInputElementExt} from '../../../types/types';
-import {CustomKeyboardEvent} from '../../../types/events';
+import {IronKeyboardEvent} from '../../../types/events';
 import {
   AutocompleteQuery,
   GrAutocomplete,
 } from '../gr-autocomplete/gr-autocomplete';
-import {getKeyboardEvent} from '../../../utils/dom-util';
 
 const AWAIT_MAX_ITERS = 10;
 const AWAIT_STEP = 5;
@@ -205,8 +204,8 @@
       this.getGrAutocomplete()) as HTMLInputElement;
   }
 
-  _handleEnter(e: CustomKeyboardEvent) {
-    e = getKeyboardEvent(e);
+  _handleEnter(event: IronKeyboardEvent) {
+    const e = event.detail.keyboardEvent;
     const target = (dom(e) as EventApi).rootTarget;
     if (target === this._nativeInput) {
       e.preventDefault();
@@ -214,8 +213,8 @@
     }
   }
 
-  _handleEsc(e: CustomKeyboardEvent) {
-    e = getKeyboardEvent(e);
+  _handleEsc(event: IronKeyboardEvent) {
+    const e = event.detail.keyboardEvent;
     const target = (dom(e) as EventApi).rootTarget;
     if (target === this._nativeInput) {
       e.preventDefault();
diff --git a/polygerrit-ui/app/elements/shared/gr-editable-label/gr-editable-label_html.ts b/polygerrit-ui/app/elements/shared/gr-editable-label/gr-editable-label_html.ts
index c303bed..e711e9d 100644
--- a/polygerrit-ui/app/elements/shared/gr-editable-label/gr-editable-label_html.ts
+++ b/polygerrit-ui/app/elements/shared/gr-editable-label/gr-editable-label_html.ts
@@ -72,7 +72,7 @@
       --iron-icon-width: 18px;
     }
     gr-button.pencil {
-      --padding: 0px 0px;
+      --gr-button-padding: 0px 0px;
     }
   </style>
   <template is="dom-if" if="[[!showAsEditPencil]]">
diff --git a/polygerrit-ui/app/elements/shared/gr-hovercard-account/gr-hovercard-account.ts b/polygerrit-ui/app/elements/shared/gr-hovercard-account/gr-hovercard-account.ts
index b789bee..06272ed 100644
--- a/polygerrit-ui/app/elements/shared/gr-hovercard-account/gr-hovercard-account.ts
+++ b/polygerrit-ui/app/elements/shared/gr-hovercard-account/gr-hovercard-account.ts
@@ -131,7 +131,12 @@
     return getLastUpdate(this.account, change);
   }
 
-  _showReviewerOrCCActions(account?: AccountInfo, change?: ChangeInfo) {
+  /** 3rd parameter is just for *triggering* re-computation. */
+  _showReviewerOrCCActions(
+    account?: AccountInfo,
+    change?: ChangeInfo,
+    _?: unknown
+  ) {
     return !!this._selfAccount && isRemovableReviewer(change, account);
   }
 
@@ -212,18 +217,38 @@
       });
   }
 
-  _computeShowLabelNeedsAttention() {
+  /** Parameters are just for *triggering* re-computation. */
+  _computeShowLabelNeedsAttention(
+    _1: unknown,
+    _2: unknown,
+    _3: unknown,
+    _4: unknown
+  ) {
     return this.isAttentionEnabled && this.hasUserAttention;
   }
 
-  _computeShowActionAddToAttentionSet() {
+  /** Parameters are just for *triggering* re-computation. */
+  _computeShowActionAddToAttentionSet(
+    _1: unknown,
+    _2: unknown,
+    _3: unknown,
+    _4: unknown,
+    _5: unknown
+  ) {
     const involvedOrSelf =
       isInvolved(this.change, this._selfAccount) ||
       isSelf(this.account, this._selfAccount);
     return involvedOrSelf && this.isAttentionEnabled && !this.hasUserAttention;
   }
 
-  _computeShowActionRemoveFromAttentionSet() {
+  /** Parameters are just for *triggering* re-computation. */
+  _computeShowActionRemoveFromAttentionSet(
+    _1: unknown,
+    _2: unknown,
+    _3: unknown,
+    _4: unknown,
+    _5: unknown
+  ) {
     const involvedOrSelf =
       isInvolved(this.change, this._selfAccount) ||
       isSelf(this.account, this._selfAccount);
diff --git a/polygerrit-ui/app/elements/shared/gr-hovercard-account/gr-hovercard-account_html.ts b/polygerrit-ui/app/elements/shared/gr-hovercard-account/gr-hovercard-account_html.ts
index 076553b..adca888 100644
--- a/polygerrit-ui/app/elements/shared/gr-hovercard-account/gr-hovercard-account_html.ts
+++ b/polygerrit-ui/app/elements/shared/gr-hovercard-account/gr-hovercard-account_html.ts
@@ -45,9 +45,7 @@
     .action {
       border-top: 1px solid var(--border-color);
       padding: var(--spacing-s) var(--spacing-l);
-      --gr-button: {
-        padding: var(--spacing-s) var(--spacing-m);
-      }
+      --gr-button-padding: var(--spacing-s) var(--spacing-m);
     }
     .attention {
       background-color: var(--emphasis-color);
diff --git a/polygerrit-ui/app/elements/shared/gr-hovercard/gr-hovercard-behavior.ts b/polygerrit-ui/app/elements/shared/gr-hovercard/gr-hovercard-behavior.ts
index bbd1708..356a248 100644
--- a/polygerrit-ui/app/elements/shared/gr-hovercard/gr-hovercard-behavior.ts
+++ b/polygerrit-ui/app/elements/shared/gr-hovercard/gr-hovercard-behavior.ts
@@ -471,6 +471,7 @@
 
 export interface GrHovercardBehaviorInterface {
   _target: HTMLElement | null;
+  _isShowing: boolean;
   ready(): void;
   removeListeners(): void;
   debounceHide(): void;
diff --git a/polygerrit-ui/app/elements/shared/gr-label-info/gr-label-info.ts b/polygerrit-ui/app/elements/shared/gr-label-info/gr-label-info.ts
index dba36a4..5a6d821 100644
--- a/polygerrit-ui/app/elements/shared/gr-label-info/gr-label-info.ts
+++ b/polygerrit-ui/app/elements/shared/gr-label-info/gr-label-info.ts
@@ -24,23 +24,26 @@
 import '../gr-label/gr-label';
 import '../gr-tooltip-content/gr-tooltip-content';
 import {dom, EventApi} from '@polymer/polymer/lib/legacy/polymer.dom';
-import {PolymerElement} from '@polymer/polymer/polymer-element';
-import {htmlTemplate} from './gr-label-info_html';
 import {GerritNav} from '../../core/gr-navigation/gr-navigation';
-import {customElement, property} from '@polymer/decorators';
 import {
-  ChangeInfo,
   AccountInfo,
   LabelInfo,
   ApprovalInfo,
   AccountId,
   isQuickLabelInfo,
   isDetailedLabelInfo,
+  LabelNameToInfoMap,
 } from '../../../types/common';
+import {LitElement, css, html} from 'lit';
+import {customElement, property} from 'lit/decorators';
 import {GrButton} from '../gr-button/gr-button';
 import {getVotingRangeOrDefault} from '../../../utils/label-util';
 import {appContext} from '../../../services/app-context';
 import {ParsedChangeInfo} from '../../../types/types';
+import {fontStyles} from '../../../styles/gr-font-styles';
+import {sharedStyles} from '../../../styles/shared-styles';
+import {votingStyles} from '../../../styles/gr-voting-styles';
+import {ifDefined} from 'lit/directives/if-defined';
 
 declare global {
   interface HTMLElementTagNameMap {
@@ -57,16 +60,12 @@
 
 interface FormattedLabel {
   className?: LabelClassName;
-  account: ApprovalInfo;
+  account: ApprovalInfo | AccountInfo;
   value: string;
 }
 
 @customElement('gr-label-info')
-export class GrLabelInfo extends PolymerElement {
-  static get template() {
-    return htmlTemplate;
-  }
-
+export class GrLabelInfo extends LitElement {
   @property({type: Object})
   labelInfo?: LabelInfo;
 
@@ -89,11 +88,150 @@
   // TODO(TS): not used, remove later
   _xhrPromise?: Promise<void>;
 
+  static override get styles() {
+    return [
+      sharedStyles,
+      fontStyles,
+      votingStyles,
+      css`
+        .placeholder {
+          color: var(--deemphasized-text-color);
+        }
+        .hidden {
+          display: none;
+        }
+        /* Note that most of the .voteChip styles are coming from the
+         gr-voting-styles include. */
+        .voteChip {
+          display: flex;
+          justify-content: center;
+          margin-right: var(--spacing-s);
+          padding: 1px;
+        }
+        .max {
+          background-color: var(--vote-color-approved);
+        }
+        .min {
+          background-color: var(--vote-color-rejected);
+        }
+        .positive {
+          background-color: var(--vote-color-recommended);
+          border-radius: 12px;
+          border: 1px solid var(--vote-outline-recommended);
+          color: var(--chip-color);
+        }
+        .negative {
+          background-color: var(--vote-color-disliked);
+          border-radius: 12px;
+          border: 1px solid var(--vote-outline-disliked);
+          color: var(--chip-color);
+        }
+        .hidden {
+          display: none;
+        }
+        td {
+          vertical-align: top;
+        }
+        tr {
+          min-height: var(--line-height-normal);
+        }
+        gr-tooltip-content {
+          display: block;
+        }
+        gr-button {
+          vertical-align: top;
+        }
+        gr-button::part(paper-button) {
+          height: var(--line-height-normal);
+          width: var(--line-height-normal);
+          padding: 0;
+        }
+        gr-button[disabled] iron-icon {
+          color: var(--border-color);
+        }
+        gr-account-link {
+          --account-max-length: 100px;
+          margin-right: var(--spacing-xs);
+        }
+        iron-icon {
+          height: calc(var(--line-height-normal) - 2px);
+          width: calc(var(--line-height-normal) - 2px);
+        }
+        .labelValueContainer:not(:first-of-type) td {
+          padding-top: var(--spacing-s);
+        }
+      `,
+    ];
+  }
+
+  override render() {
+    return html` <p
+        class="placeholder ${this.computeShowPlaceholder(
+          this.labelInfo,
+          this.change?.labels
+        )}"
+      >
+        No votes
+      </p>
+      <table>
+        ${this.mapLabelInfo(
+          this.labelInfo,
+          this.account,
+          this.change?.labels
+        ).map(mappedLabel => this.renderLabel(mappedLabel))}
+      </table>`;
+  }
+
+  renderLabel(mappedLabel: FormattedLabel) {
+    const {labelInfo, change} = this;
+    return html` <tr class="labelValueContainer">
+      <td>
+        <gr-tooltip-content
+          has-tooltip
+          title="${this._computeValueTooltip(labelInfo, mappedLabel.value)}"
+        >
+          <gr-label class="${mappedLabel.className} voteChip font-small">
+            ${mappedLabel.value}
+          </gr-label>
+        </gr-tooltip-content>
+      </td>
+      <td>
+        <gr-account-link
+          .account="${mappedLabel.account}"
+          .change="${change}"
+        ></gr-account-link>
+      </td>
+      <td>
+        <gr-tooltip-content has-tooltip title="Remove vote">
+          <gr-button
+            link
+            aria-label="Remove vote"
+            @click="${this.onDeleteVote}"
+            data-account-id="${ifDefined(mappedLabel.account._account_id)}"
+            class="deleteBtn ${this.computeDeleteClass(
+              mappedLabel.account,
+              this.mutable,
+              change
+            )}"
+          >
+            <iron-icon icon="gr-icons:delete"></iron-icon>
+          </gr-button>
+        </gr-tooltip-content>
+      </td>
+    </tr>`;
+  }
+
   /**
    * This method also listens on change.labels.*,
    * to trigger computation when a label is removed from the change.
+   *
+   * The third parameter is just for *triggering* computation.
    */
-  _mapLabelInfo(labelInfo?: LabelInfo, account?: AccountInfo) {
+  private mapLabelInfo(
+    labelInfo?: LabelInfo,
+    account?: AccountInfo,
+    _?: LabelNameToInfoMap
+  ): FormattedLabel[] {
     const result: FormattedLabel[] = [];
     if (!labelInfo) {
       return result;
@@ -108,7 +246,8 @@
           {
             value: ok ? '👍️' : '👎️',
             className: ok ? LabelClassName.POSITIVE : LabelClassName.NEGATIVE,
-            account: ok ? labelInfo.approved : labelInfo.rejected,
+            // executed only if approved or rejected is not undefined
+            account: ok ? labelInfo.approved! : labelInfo.rejected!,
           },
         ];
       }
@@ -143,7 +282,7 @@
             labelClassName = LabelClassName.NEGATIVE;
           }
         }
-        const formattedLabel = {
+        const formattedLabel: FormattedLabel = {
           value: `${labelValPrefix}${label.value}`,
           className: labelClassName,
           account: label,
@@ -167,16 +306,16 @@
    * @param reviewer An object describing the reviewer that left the
    *     vote.
    */
-  _computeDeleteClass(
+  private computeDeleteClass(
     reviewer: ApprovalInfo,
     mutable: boolean,
-    change: ChangeInfo
+    change?: ParsedChangeInfo
   ) {
     if (!mutable || !change || !change.removable_reviewers) {
       return 'hidden';
     }
     const removable = change.removable_reviewers;
-    if (removable.find(r => r._account_id === reviewer._account_id)) {
+    if (removable.find(r => r._account_id === reviewer?._account_id)) {
       return '';
     }
     return 'hidden';
@@ -186,7 +325,7 @@
    * Closure annotation for Polymer.prototype.splice is off.
    * For now, suppressing annotations.
    */
-  _onDeleteVote(e: MouseEvent) {
+  private onDeleteVote(e: MouseEvent) {
     if (!this.change) return;
 
     e.preventDefault();
@@ -220,7 +359,7 @@
       });
   }
 
-  _computeValueTooltip(labelInfo: LabelInfo, score: string) {
+  _computeValueTooltip(labelInfo: LabelInfo | undefined, score: string) {
     if (
       !labelInfo ||
       !isDetailedLabelInfo(labelInfo) ||
@@ -234,8 +373,13 @@
   /**
    * This method also listens change.labels.* in
    * order to trigger computation when a label is removed from the change.
+   *
+   * The second parameter is just for *triggering* computation.
    */
-  _computeShowPlaceholder(labelInfo?: LabelInfo) {
+  private computeShowPlaceholder(
+    labelInfo?: LabelInfo,
+    _?: LabelNameToInfoMap
+  ) {
     if (!labelInfo) {
       return '';
     }
diff --git a/polygerrit-ui/app/elements/shared/gr-label-info/gr-label-info_html.ts b/polygerrit-ui/app/elements/shared/gr-label-info/gr-label-info_html.ts
deleted file mode 100644
index 552bd08..0000000
--- a/polygerrit-ui/app/elements/shared/gr-label-info/gr-label-info_html.ts
+++ /dev/null
@@ -1,135 +0,0 @@
-/**
- * @license
- * Copyright (C) 2020 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-import {html} from '@polymer/polymer/lib/utils/html-tag';
-
-export const htmlTemplate = html`
-  <style include="gr-font-styles">
-    /* Workaround for empty style block - see https://github.com/Polymer/tools/issues/408 */
-  </style>
-  <style include="gr-voting-styles">
-    /* Workaround for empty style block - see https://github.com/Polymer/tools/issues/408 */
-  </style>
-  <style include="shared-styles">
-    .placeholder {
-      color: var(--deemphasized-text-color);
-    }
-    .hidden {
-      display: none;
-    }
-    /* Note that most of the .voteChip styles are coming from the
-       gr-voting-styles include. */
-    .voteChip {
-      display: flex;
-      justify-content: center;
-      margin-right: var(--spacing-s);
-      padding: 1px;
-    }
-    .max {
-      background-color: var(--vote-color-approved);
-    }
-    .min {
-      background-color: var(--vote-color-rejected);
-    }
-    .positive {
-      background-color: var(--vote-color-recommended);
-      border-radius: 12px;
-      border: 1px solid var(--vote-outline-recommended);
-      color: var(--chip-color);
-    }
-    .negative {
-      background-color: var(--vote-color-disliked);
-      border-radius: 12px;
-      border: 1px solid var(--vote-outline-disliked);
-      color: var(--chip-color);
-    }
-    .hidden {
-      display: none;
-    }
-    td {
-      vertical-align: top;
-    }
-    tr {
-      min-height: var(--line-height-normal);
-    }
-    gr-button {
-      vertical-align: top;
-      --gr-button: {
-        height: var(--line-height-normal);
-        width: var(--line-height-normal);
-        padding: 0;
-      }
-    }
-    gr-button[disabled] iron-icon {
-      color: var(--border-color);
-    }
-    gr-account-link {
-      --account-max-length: 100px;
-      margin-right: var(--spacing-xs);
-    }
-    iron-icon {
-      height: calc(var(--line-height-normal) - 2px);
-      width: calc(var(--line-height-normal) - 2px);
-    }
-    .labelValueContainer:not(:first-of-type) td {
-      padding-top: var(--spacing-s);
-    }
-  </style>
-  <p
-    class$="placeholder [[_computeShowPlaceholder(labelInfo, change.labels.*)]]"
-  >
-    No votes
-  </p>
-  <table>
-    <template
-      is="dom-repeat"
-      items="[[_mapLabelInfo(labelInfo, account, change.labels.*)]]"
-      as="mappedLabel"
-    >
-      <tr class="labelValueContainer">
-        <td>
-          <gr-tooltip-content
-            has-tooltip
-            title="[[_computeValueTooltip(labelInfo, mappedLabel.value)]]"
-          >
-            <gr-label class$="[[mappedLabel.className]] voteChip font-small">
-              [[mappedLabel.value]]
-            </gr-label>
-          </gr-tooltip-content>
-        </td>
-        <td>
-          <gr-account-link
-            account="[[mappedLabel.account]]"
-            change="[[change]]"
-          ></gr-account-link>
-        </td>
-        <td>
-          <gr-tooltip-content has-tooltip title="Remove vote">
-            <gr-button
-              link=""
-              aria-label="Remove vote"
-              on-click="_onDeleteVote"
-              data-account-id$="[[mappedLabel.account._account_id]]"
-              class$="deleteBtn [[_computeDeleteClass(mappedLabel.account, mutable, change)]]"
-            >
-              <iron-icon icon="gr-icons:delete"></iron-icon>
-            </gr-button>
-          </gr-tooltip-content>
-        </td>
-      </tr>
-    </template>
-  </table>
-`;
diff --git a/polygerrit-ui/app/elements/shared/gr-label-info/gr-label-info_test.ts b/polygerrit-ui/app/elements/shared/gr-label-info/gr-label-info_test.ts
index b1bd6fa..cad1f69 100644
--- a/polygerrit-ui/app/elements/shared/gr-label-info/gr-label-info_test.ts
+++ b/polygerrit-ui/app/elements/shared/gr-label-info/gr-label-info_test.ts
@@ -66,15 +66,17 @@
       element.labelInfo = label;
       element.label = 'Code-Review';
 
-      await flush();
+      await element.updateComplete;
     });
 
-    test('_computeCanDeleteVote', () => {
+    test('_computeCanDeleteVote', async () => {
       element.mutable = false;
+      await element.updateComplete;
       const removeButton = queryAndAssert<GrButton>(element, 'gr-button');
       assert.isTrue(isHidden(removeButton));
       element.change!.removable_reviewers = [account];
       element.mutable = true;
+      await element.updateComplete;
       assert.isFalse(isHidden(removeButton));
     });
 
@@ -109,14 +111,14 @@
   suite('label color and order', () => {
     test('valueless label rejected', async () => {
       element.labelInfo = {rejected: {name: 'someone'}};
-      await flush();
+      await element.updateComplete;
       const labels = queryAll<GrLabel>(element, 'gr-label');
       assert.isTrue(labels[0].classList.contains('negative'));
     });
 
     test('valueless label approved', async () => {
       element.labelInfo = {approved: {name: 'someone'}};
-      await flush();
+      await element.updateComplete;
       const labels = queryAll<GrLabel>(element, 'gr-label');
       assert.isTrue(labels[0].classList.contains('positive'));
     });
@@ -137,7 +139,7 @@
           '+2': 'Ready to submit',
         },
       };
-      await flush();
+      await element.updateComplete;
       const labels = queryAll<GrLabel>(element, 'gr-label');
       assert.isTrue(labels[0].classList.contains('max'));
       assert.isTrue(labels[1].classList.contains('positive'));
@@ -157,7 +159,7 @@
           '+1': 'Looks good to me',
         },
       };
-      await flush();
+      await element.updateComplete;
       const labels = queryAll<GrLabel>(element, 'gr-label');
       assert.isTrue(labels[0].classList.contains('max'));
       assert.isTrue(labels[1].classList.contains('min'));
@@ -175,7 +177,7 @@
           '+2': 'Looks good to me',
         },
       };
-      await flush();
+      await element.updateComplete;
       const labels = queryAll<GrLabel>(element, 'gr-label');
       assert.isTrue(labels[0].classList.contains('max'));
       assert.isTrue(labels[1].classList.contains('positive'));
@@ -195,7 +197,7 @@
           '+1': 'Looks good to me',
         },
       };
-      await flush();
+      await element.updateComplete;
       const chips = queryAll<GrAccountLink>(element, 'gr-account-link');
       assert.equal(chips[0].account!._account_id, element.account._account_id);
     });
@@ -217,7 +219,7 @@
     assert.equal(element._computeValueTooltip(labelInfo, score), '');
   });
 
-  test('placeholder', () => {
+  test('placeholder', async () => {
     const values = {
       '0': 'No score',
       '+1': 'good',
@@ -226,30 +228,37 @@
       '-2': 'terrible',
     };
     element.labelInfo = {};
+    await element.updateComplete;
     assert.isFalse(
       isHidden(queryAndAssert<HTMLParagraphElement>(element, '.placeholder'))
     );
     element.labelInfo = {all: [], values};
+    await element.updateComplete;
     assert.isFalse(
       isHidden(queryAndAssert<HTMLParagraphElement>(element, '.placeholder'))
     );
     element.labelInfo = {all: [{value: 1}], values};
+    await element.updateComplete;
     assert.isTrue(
       isHidden(queryAndAssert<HTMLParagraphElement>(element, '.placeholder'))
     );
     element.labelInfo = {rejected: account};
+    await element.updateComplete;
     assert.isTrue(
       isHidden(queryAndAssert<HTMLParagraphElement>(element, '.placeholder'))
     );
     element.labelInfo = {rejected: account, all: [{value: 1}], values};
+    await element.updateComplete;
     assert.isTrue(
       isHidden(queryAndAssert<HTMLParagraphElement>(element, '.placeholder'))
     );
     element.labelInfo = {approved: account};
+    await element.updateComplete;
     assert.isTrue(
       isHidden(queryAndAssert<HTMLParagraphElement>(element, '.placeholder'))
     );
     element.labelInfo = {approved: account, all: [{value: 1}], values};
+    await element.updateComplete;
     assert.isTrue(
       isHidden(queryAndAssert<HTMLParagraphElement>(element, '.placeholder'))
     );
diff --git a/polygerrit-ui/app/elements/shared/gr-list-view/gr-list-view.ts b/polygerrit-ui/app/elements/shared/gr-list-view/gr-list-view.ts
index 055c45f..4f02897 100644
--- a/polygerrit-ui/app/elements/shared/gr-list-view/gr-list-view.ts
+++ b/polygerrit-ui/app/elements/shared/gr-list-view/gr-list-view.ts
@@ -53,7 +53,7 @@
   filter?: string;
 
   @property({type: Number})
-  offset?: number;
+  offset = 0;
 
   @property({type: Boolean})
   loading?: boolean;
@@ -102,8 +102,8 @@
     offset: number,
     direction: number,
     itemsPerPage: number,
-    filter: string,
-    path: string
+    filter: string | undefined,
+    path = ''
   ) {
     // Offset could be a string when passed from the router.
     offset = +(offset || 0);
diff --git a/polygerrit-ui/app/elements/shared/gr-overlay/gr-overlay.ts b/polygerrit-ui/app/elements/shared/gr-overlay/gr-overlay.ts
index 1622365..1b84089 100644
--- a/polygerrit-ui/app/elements/shared/gr-overlay/gr-overlay.ts
+++ b/polygerrit-ui/app/elements/shared/gr-overlay/gr-overlay.ts
@@ -40,6 +40,9 @@
   IronOverlayBehavior as IronOverlayBehavior
 );
 
+/**
+ * @attr {Boolean} with-backdrop - inherited from IronOverlay
+ */
 @customElement('gr-overlay')
 export class GrOverlay extends base {
   static get template() {
diff --git a/polygerrit-ui/app/elements/shared/gr-select/gr-select.ts b/polygerrit-ui/app/elements/shared/gr-select/gr-select.ts
index e71add9..571272d 100644
--- a/polygerrit-ui/app/elements/shared/gr-select/gr-select.ts
+++ b/polygerrit-ui/app/elements/shared/gr-select/gr-select.ts
@@ -34,7 +34,7 @@
   }
 
   @property({type: String, notify: true})
-  bindValue?: string;
+  bindValue?: string | number;
 
   get nativeSelect() {
     // gr-select is not a shadow component
@@ -49,14 +49,12 @@
     // It's possible to have a value of 0.
     if (this.bindValue !== undefined) {
       // Set for chrome/safari so it happens instantly
-      this.nativeSelect.value = this.bindValue;
+      this.nativeSelect.value = String(this.bindValue);
       // Async needed for firefox to populate value. It was trying to do it
       // before options from a dom-repeat were rendered previously.
       // See https://bugs.chromium.org/p/gerrit/issues/detail?id=7735
       setTimeout(() => {
-        // TODO(TS): maybe should check for undefined before assigning
-        // or fallback to ''
-        this.nativeSelect.value = this.bindValue!;
+        this.nativeSelect.value = String(this.bindValue);
       }, 1);
     }
   }
diff --git a/polygerrit-ui/app/elements/shared/gr-textarea/gr-textarea.ts b/polygerrit-ui/app/elements/shared/gr-textarea/gr-textarea.ts
index ce1eec3..434da1f 100644
--- a/polygerrit-ui/app/elements/shared/gr-textarea/gr-textarea.ts
+++ b/polygerrit-ui/app/elements/shared/gr-textarea/gr-textarea.ts
@@ -33,7 +33,7 @@
   Item,
   ItemSelectedEvent,
 } from '../gr-autocomplete-dropdown/gr-autocomplete-dropdown';
-import {CustomKeyboardEvent} from '../../../types/events';
+import {IronKeyboardEvent} from '../../../types/events';
 
 const MAX_ITEMS_DROPDOWN = 10;
 
@@ -238,7 +238,7 @@
     this._setEmoji(this.$.emojiSuggestions.getCurrentText());
   }
 
-  _handleEnterByKey(e: CustomKeyboardEvent) {
+  _handleEnterByKey(e: IronKeyboardEvent) {
     // Enter should have newline behavior if the picker is closed or if the user
     // has only typed ':'. Also make sure that shortcuts aren't clobbered.
     if (this._hideEmojiAutocomplete || this.disableEnterKeyForSelectingEmoji) {
@@ -420,7 +420,7 @@
     );
   }
 
-  private indent(e: CustomKeyboardEvent): void {
+  private indent(e: IronKeyboardEvent): void {
     if (!document.queryCommandSupported('insertText')) {
       return;
     }
diff --git a/polygerrit-ui/app/elements/shared/gr-textarea/gr-textarea_test.ts b/polygerrit-ui/app/elements/shared/gr-textarea/gr-textarea_test.ts
index 7790c73..7e59692 100644
--- a/polygerrit-ui/app/elements/shared/gr-textarea/gr-textarea_test.ts
+++ b/polygerrit-ui/app/elements/shared/gr-textarea/gr-textarea_test.ts
@@ -20,7 +20,7 @@
 import {GrTextarea} from './gr-textarea';
 import {html} from '@polymer/polymer/lib/utils/html-tag';
 import * as MockInteractions from '@polymer/iron-test-helpers/mock-interactions';
-import {CustomKeyboardEvent} from '../../../types/events';
+import {IronKeyboardEvent} from '../../../types/events';
 import {ItemSelectedEvent} from '../gr-autocomplete-dropdown/gr-autocomplete-dropdown';
 
 const basicFixture = fixtureFromElement('gr-textarea');
@@ -240,7 +240,7 @@
     element._handleEnterByKey(
       new CustomEvent('keydown', {
         detail: {keyboardEvent: {keyCode: 13}},
-      }) as CustomKeyboardEvent
+      }) as IronKeyboardEvent
     );
     await flush();
     assert.deepEqual(indentCommand.args[0], ['insertText', false, '\n    ']);
@@ -252,7 +252,7 @@
     element._handleEnterByKey(
       new CustomEvent('keydown', {
         detail: {keyboardEvent: {keyCode: 13, ctrlKey: true}},
-      }) as CustomKeyboardEvent
+      }) as IronKeyboardEvent
     );
     await flush();
     assert.isTrue(indentCommand.notCalled);
@@ -260,7 +260,7 @@
     element._handleEnterByKey(
       new CustomEvent('keydown', {
         detail: {keyboardEvent: {keyCode: 13, metaKey: true}},
-      }) as CustomKeyboardEvent
+      }) as IronKeyboardEvent
     );
     await flush();
     assert.isTrue(indentCommand.notCalled);
diff --git a/polygerrit-ui/app/elements/shared/gr-tooltip-content/gr-tooltip-content.ts b/polygerrit-ui/app/elements/shared/gr-tooltip-content/gr-tooltip-content.ts
index 2b9a868..0585aec8 100644
--- a/polygerrit-ui/app/elements/shared/gr-tooltip-content/gr-tooltip-content.ts
+++ b/polygerrit-ui/app/elements/shared/gr-tooltip-content/gr-tooltip-content.ts
@@ -40,7 +40,7 @@
   @property({type: String, attribute: 'max-width', reflect: true})
   maxWidth?: string;
 
-  @property({type: Boolean})
+  @property({type: Boolean, attribute: 'show-icon'})
   showIcon = false;
 
   // Should be private but used in tests.
diff --git a/polygerrit-ui/app/mixins/keyboard-shortcut-mixin/keyboard-shortcut-mixin.ts b/polygerrit-ui/app/mixins/keyboard-shortcut-mixin/keyboard-shortcut-mixin.ts
index 9092919..3d1e120 100644
--- a/polygerrit-ui/app/mixins/keyboard-shortcut-mixin/keyboard-shortcut-mixin.ts
+++ b/polygerrit-ui/app/mixins/keyboard-shortcut-mixin/keyboard-shortcut-mixin.ts
@@ -14,104 +14,31 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-/*
-
-How to Add a Keyboard Shortcut
-==============================
-
-A keyboard shortcut is composed of the following parts:
-
-  1. A semantic identifier (e.g. OPEN_CHANGE, NEXT_PAGE)
-  2. Documentation for the keyboard shortcut help dialog
-  3. A binding between key combos and the semantic identifier
-  4. A binding between the semantic identifier and a listener
-
-Parts (1) and (2) for all shortcuts are defined in this file. The semantic
-identifier is declared in the Shortcut enum near the head of this script:
-
-  const Shortcut = {
-    // ...
-    TOGGLE_LEFT_PANE: 'TOGGLE_LEFT_PANE',
-    // ...
-  };
-
-Immediately following the Shortcut enum definition, there is a _describe
-function defined which is then invoked many times to populate the help dialog.
-Add a new invocation here to document the shortcut:
-
-  _describe(Shortcut.TOGGLE_LEFT_PANE, ShortcutSection.DIFFS,
-      'Hide/show left diff');
-
-When an attached view binds one or more key combos to this shortcut, the help
-dialog will display this text in the given section (in this case, "Diffs"). See
-the ShortcutSection enum immediately below for the list of supported sections.
-
-Part (3), the actual key bindings, are declared by gr-app. In the future, this
-system may be expanded to allow key binding customizations by plugins or user
-preferences. Key bindings are defined in the following forms:
-
-  // Ordinary shortcut with a single binding.
-  this.bindShortcut(
-      Shortcut.TOGGLE_LEFT_PANE, 'shift+a');
-
-  // Ordinary shortcut with multiple bindings.
-  this.bindShortcut(
-      Shortcut.CURSOR_NEXT_FILE, 'j', 'down');
-
-  // A "go-key" keyboard shortcut, which is combined with a previously and
-  // continuously pressed "go" key (the go-key is hard-coded as 'g').
-  this.bindShortcut(
-      Shortcut.GO_TO_OPENED_CHANGES, SPECIAL_SHORTCUT.GO_KEY, 'o');
-
-  // A "doc-only" keyboard shortcut. This declares the key-binding for help
-  // dialog purposes, but doesn't actually implement the binding. It is up
-  // to some element to implement this binding using iron-a11y-keys-behavior's
-  // keyBindings property.
-  this.bindShortcut(
-      Shortcut.EXPAND_ALL_COMMENT_THREADS, SPECIAL_SHORTCUT.DOC_ONLY, 'e');
-
-Part (4), the listener definitions, are declared by the view or element that
-implements the shortcut behavior. This is done by implementing a method named
-keyboardShortcuts() in an element that mixes in this behavior, returning an
-object that maps semantic identifiers (as property names) to listener method
-names, like this:
-
-  keyboardShortcuts() {
-    return {
-      [Shortcut.TOGGLE_LEFT_PANE]: '_handleToggleLeftPane',
-    };
-  },
-
-You can implement key bindings in an element that is hosted by a view IF that
-element is always attached exactly once under that view (e.g. the search bar in
-gr-app). When that is not the case, you will have to define a doc-only binding
-in gr-app, declare the shortcut in the view that hosts the element, and use
-iron-a11y-keys-behavior's keyBindings attribute to implement the binding in the
-element. An example of this is in comment threads. A diff view supports actions
-on comment threads, but there may be zero or many comment threads attached at
-any given point. So the shortcut is declared as doc-only by the diff view and
-by gr-app, and actually implemented by gr-comment-thread.
-
-NOTE: doc-only shortcuts will not be customizable in the same way that other
-shortcuts are.
-*/
-
 import {IronA11yKeysBehavior} from '@polymer/iron-a11y-keys-behavior/iron-a11y-keys-behavior';
-import {dom, EventApi} from '@polymer/polymer/lib/legacy/polymer.dom';
 import {mixinBehaviors} from '@polymer/polymer/lib/legacy/class';
 import {property} from '@polymer/decorators';
 import {PolymerElement} from '@polymer/polymer';
 import {check, Constructor} from '../../utils/common-util';
-import {getKeyboardEvent, isModifierPressed} from '../../utils/dom-util';
-import {CustomKeyboardEvent} from '../../types/events';
+import {isModifierPressed} from '../../utils/dom-util';
+import {IronKeyboardEvent} from '../../types/events';
 import {appContext} from '../../services/app-context';
+import {
+  Shortcut,
+  ShortcutSection,
+  SPECIAL_SHORTCUT,
+} from '../../services/shortcuts/shortcuts-config';
+import {
+  ShortcutListener,
+  SectionView,
+} from '../../services/shortcuts/shortcuts-service';
 
-/** Enum for all special shortcuts */
-export enum SPECIAL_SHORTCUT {
-  DOC_ONLY = 'DOC_ONLY',
-  GO_KEY = 'GO_KEY',
-  V_KEY = 'V_KEY',
-}
+export {
+  Shortcut,
+  ShortcutSection,
+  SPECIAL_SHORTCUT,
+  ShortcutListener,
+  SectionView,
+};
 
 // The maximum age of a keydown event to be used in a jump navigation. This
 // is only for cases when the keyup event is lost.
@@ -119,631 +46,6 @@
 
 const V_KEY_TIMEOUT_MS = 1000;
 
-/**
- * Enum for all shortcut sections, where that shortcut should be applied to.
- */
-export enum ShortcutSection {
-  ACTIONS = 'Actions',
-  DIFFS = 'Diffs',
-  EVERYWHERE = 'Global Shortcuts',
-  FILE_LIST = 'File list',
-  NAVIGATION = 'Navigation',
-  REPLY_DIALOG = 'Reply dialog',
-}
-
-/**
- * Enum for all possible shortcut names.
- */
-export enum Shortcut {
-  OPEN_SHORTCUT_HELP_DIALOG = 'OPEN_SHORTCUT_HELP_DIALOG',
-  GO_TO_USER_DASHBOARD = 'GO_TO_USER_DASHBOARD',
-  GO_TO_OPENED_CHANGES = 'GO_TO_OPENED_CHANGES',
-  GO_TO_MERGED_CHANGES = 'GO_TO_MERGED_CHANGES',
-  GO_TO_ABANDONED_CHANGES = 'GO_TO_ABANDONED_CHANGES',
-  GO_TO_WATCHED_CHANGES = 'GO_TO_WATCHED_CHANGES',
-
-  CURSOR_NEXT_CHANGE = 'CURSOR_NEXT_CHANGE',
-  CURSOR_PREV_CHANGE = 'CURSOR_PREV_CHANGE',
-  OPEN_CHANGE = 'OPEN_CHANGE',
-  NEXT_PAGE = 'NEXT_PAGE',
-  PREV_PAGE = 'PREV_PAGE',
-  TOGGLE_CHANGE_REVIEWED = 'TOGGLE_CHANGE_REVIEWED',
-  TOGGLE_CHANGE_STAR = 'TOGGLE_CHANGE_STAR',
-  REFRESH_CHANGE_LIST = 'REFRESH_CHANGE_LIST',
-  OPEN_SUBMIT_DIALOG = 'OPEN_SUBMIT_DIALOG',
-  TOGGLE_ATTENTION_SET = 'TOGGLE_ATTENTION_SET',
-
-  OPEN_REPLY_DIALOG = 'OPEN_REPLY_DIALOG',
-  OPEN_DOWNLOAD_DIALOG = 'OPEN_DOWNLOAD_DIALOG',
-  EXPAND_ALL_MESSAGES = 'EXPAND_ALL_MESSAGES',
-  COLLAPSE_ALL_MESSAGES = 'COLLAPSE_ALL_MESSAGES',
-  UP_TO_DASHBOARD = 'UP_TO_DASHBOARD',
-  UP_TO_CHANGE = 'UP_TO_CHANGE',
-  TOGGLE_DIFF_MODE = 'TOGGLE_DIFF_MODE',
-  REFRESH_CHANGE = 'REFRESH_CHANGE',
-  EDIT_TOPIC = 'EDIT_TOPIC',
-  DIFF_AGAINST_BASE = 'DIFF_AGAINST_BASE',
-  DIFF_AGAINST_LATEST = 'DIFF_AGAINST_LATEST',
-  DIFF_BASE_AGAINST_LEFT = 'DIFF_BASE_AGAINST_LEFT',
-  DIFF_RIGHT_AGAINST_LATEST = 'DIFF_RIGHT_AGAINST_LATEST',
-  DIFF_BASE_AGAINST_LATEST = 'DIFF_BASE_AGAINST_LATEST',
-
-  NEXT_LINE = 'NEXT_LINE',
-  PREV_LINE = 'PREV_LINE',
-  VISIBLE_LINE = 'VISIBLE_LINE',
-  NEXT_CHUNK = 'NEXT_CHUNK',
-  PREV_CHUNK = 'PREV_CHUNK',
-  TOGGLE_ALL_DIFF_CONTEXT = 'TOGGLE_ALL_DIFF_CONTEXT',
-  NEXT_COMMENT_THREAD = 'NEXT_COMMENT_THREAD',
-  PREV_COMMENT_THREAD = 'PREV_COMMENT_THREAD',
-  EXPAND_ALL_COMMENT_THREADS = 'EXPAND_ALL_COMMENT_THREADS',
-  COLLAPSE_ALL_COMMENT_THREADS = 'COLLAPSE_ALL_COMMENT_THREADS',
-  LEFT_PANE = 'LEFT_PANE',
-  RIGHT_PANE = 'RIGHT_PANE',
-  TOGGLE_LEFT_PANE = 'TOGGLE_LEFT_PANE',
-  NEW_COMMENT = 'NEW_COMMENT',
-  SAVE_COMMENT = 'SAVE_COMMENT',
-  OPEN_DIFF_PREFS = 'OPEN_DIFF_PREFS',
-  TOGGLE_DIFF_REVIEWED = 'TOGGLE_DIFF_REVIEWED',
-
-  NEXT_FILE = 'NEXT_FILE',
-  PREV_FILE = 'PREV_FILE',
-  NEXT_FILE_WITH_COMMENTS = 'NEXT_FILE_WITH_COMMENTS',
-  PREV_FILE_WITH_COMMENTS = 'PREV_FILE_WITH_COMMENTS',
-  NEXT_UNREVIEWED_FILE = 'NEXT_UNREVIEWED_FILE',
-  CURSOR_NEXT_FILE = 'CURSOR_NEXT_FILE',
-  CURSOR_PREV_FILE = 'CURSOR_PREV_FILE',
-  OPEN_FILE = 'OPEN_FILE',
-  TOGGLE_FILE_REVIEWED = 'TOGGLE_FILE_REVIEWED',
-  TOGGLE_ALL_INLINE_DIFFS = 'TOGGLE_ALL_INLINE_DIFFS',
-  TOGGLE_INLINE_DIFF = 'TOGGLE_INLINE_DIFF',
-  TOGGLE_HIDE_ALL_COMMENT_THREADS = 'TOGGLE_HIDE_ALL_COMMENT_THREADS',
-  OPEN_FILE_LIST = 'OPEN_FILE_LIST',
-
-  OPEN_FIRST_FILE = 'OPEN_FIRST_FILE',
-  OPEN_LAST_FILE = 'OPEN_LAST_FILE',
-
-  SEARCH = 'SEARCH',
-  SEND_REPLY = 'SEND_REPLY',
-  EMOJI_DROPDOWN = 'EMOJI_DROPDOWN',
-  TOGGLE_BLAME = 'TOGGLE_BLAME',
-}
-
-export type SectionView = Array<{binding: string[][]; text: string}>;
-
-/**
- * The interface for listener for shortcut events.
- */
-export type ShortcutListener = (
-  viewMap?: Map<ShortcutSection, SectionView>
-) => void;
-
-interface ShortcutHelpItem {
-  shortcut: Shortcut;
-  text: string;
-}
-
-// TODO(TS): rename to something more meaningful
-const _help = new Map<ShortcutSection, ShortcutHelpItem[]>();
-
-function _describe(shortcut: Shortcut, section: ShortcutSection, text: string) {
-  if (!_help.has(section)) {
-    _help.set(section, []);
-  }
-  const shortcuts = _help.get(section);
-  if (shortcuts) {
-    shortcuts.push({shortcut, text});
-  }
-}
-
-_describe(Shortcut.SEARCH, ShortcutSection.EVERYWHERE, 'Search');
-_describe(
-  Shortcut.OPEN_SHORTCUT_HELP_DIALOG,
-  ShortcutSection.EVERYWHERE,
-  'Show this dialog'
-);
-_describe(
-  Shortcut.GO_TO_USER_DASHBOARD,
-  ShortcutSection.EVERYWHERE,
-  'Go to User Dashboard'
-);
-_describe(
-  Shortcut.GO_TO_OPENED_CHANGES,
-  ShortcutSection.EVERYWHERE,
-  'Go to Opened Changes'
-);
-_describe(
-  Shortcut.GO_TO_MERGED_CHANGES,
-  ShortcutSection.EVERYWHERE,
-  'Go to Merged Changes'
-);
-_describe(
-  Shortcut.GO_TO_ABANDONED_CHANGES,
-  ShortcutSection.EVERYWHERE,
-  'Go to Abandoned Changes'
-);
-_describe(
-  Shortcut.GO_TO_WATCHED_CHANGES,
-  ShortcutSection.EVERYWHERE,
-  'Go to Watched Changes'
-);
-
-_describe(
-  Shortcut.CURSOR_NEXT_CHANGE,
-  ShortcutSection.ACTIONS,
-  'Select next change'
-);
-_describe(
-  Shortcut.CURSOR_PREV_CHANGE,
-  ShortcutSection.ACTIONS,
-  'Select previous change'
-);
-_describe(
-  Shortcut.OPEN_CHANGE,
-  ShortcutSection.ACTIONS,
-  'Show selected change'
-);
-_describe(Shortcut.NEXT_PAGE, ShortcutSection.ACTIONS, 'Go to next page');
-_describe(Shortcut.PREV_PAGE, ShortcutSection.ACTIONS, 'Go to previous page');
-_describe(
-  Shortcut.OPEN_REPLY_DIALOG,
-  ShortcutSection.ACTIONS,
-  'Open reply dialog to publish comments and add reviewers'
-);
-_describe(
-  Shortcut.OPEN_DOWNLOAD_DIALOG,
-  ShortcutSection.ACTIONS,
-  'Open download overlay'
-);
-_describe(
-  Shortcut.EXPAND_ALL_MESSAGES,
-  ShortcutSection.ACTIONS,
-  'Expand all messages'
-);
-_describe(
-  Shortcut.COLLAPSE_ALL_MESSAGES,
-  ShortcutSection.ACTIONS,
-  'Collapse all messages'
-);
-_describe(
-  Shortcut.REFRESH_CHANGE,
-  ShortcutSection.ACTIONS,
-  'Reload the change at the latest patch'
-);
-_describe(
-  Shortcut.TOGGLE_CHANGE_REVIEWED,
-  ShortcutSection.ACTIONS,
-  'Mark/unmark change as reviewed'
-);
-_describe(
-  Shortcut.TOGGLE_FILE_REVIEWED,
-  ShortcutSection.ACTIONS,
-  'Toggle review flag on selected file'
-);
-_describe(
-  Shortcut.REFRESH_CHANGE_LIST,
-  ShortcutSection.ACTIONS,
-  'Refresh list of changes'
-);
-_describe(
-  Shortcut.TOGGLE_CHANGE_STAR,
-  ShortcutSection.ACTIONS,
-  'Star/unstar change'
-);
-_describe(
-  Shortcut.OPEN_SUBMIT_DIALOG,
-  ShortcutSection.ACTIONS,
-  'Open submit dialog'
-);
-_describe(
-  Shortcut.TOGGLE_ATTENTION_SET,
-  ShortcutSection.ACTIONS,
-  'Toggle attention set status'
-);
-_describe(Shortcut.EDIT_TOPIC, ShortcutSection.ACTIONS, 'Add a change topic');
-_describe(
-  Shortcut.DIFF_AGAINST_BASE,
-  ShortcutSection.ACTIONS,
-  'Diff against base'
-);
-_describe(
-  Shortcut.DIFF_AGAINST_LATEST,
-  ShortcutSection.ACTIONS,
-  'Diff against latest patchset'
-);
-_describe(
-  Shortcut.DIFF_BASE_AGAINST_LEFT,
-  ShortcutSection.ACTIONS,
-  'Diff base against left'
-);
-_describe(
-  Shortcut.DIFF_RIGHT_AGAINST_LATEST,
-  ShortcutSection.ACTIONS,
-  'Diff right against latest'
-);
-_describe(
-  Shortcut.DIFF_BASE_AGAINST_LATEST,
-  ShortcutSection.ACTIONS,
-  'Diff base against latest'
-);
-
-_describe(Shortcut.NEXT_LINE, ShortcutSection.DIFFS, 'Go to next line');
-_describe(Shortcut.PREV_LINE, ShortcutSection.DIFFS, 'Go to previous line');
-_describe(
-  Shortcut.DIFF_AGAINST_BASE,
-  ShortcutSection.DIFFS,
-  'Diff against base'
-);
-_describe(
-  Shortcut.DIFF_AGAINST_LATEST,
-  ShortcutSection.DIFFS,
-  'Diff against latest patchset'
-);
-_describe(
-  Shortcut.DIFF_BASE_AGAINST_LEFT,
-  ShortcutSection.DIFFS,
-  'Diff base against left'
-);
-_describe(
-  Shortcut.DIFF_RIGHT_AGAINST_LATEST,
-  ShortcutSection.DIFFS,
-  'Diff right against latest'
-);
-_describe(
-  Shortcut.DIFF_BASE_AGAINST_LATEST,
-  ShortcutSection.DIFFS,
-  'Diff base against latest'
-);
-_describe(
-  Shortcut.VISIBLE_LINE,
-  ShortcutSection.DIFFS,
-  'Move cursor to currently visible code'
-);
-_describe(Shortcut.NEXT_CHUNK, ShortcutSection.DIFFS, 'Go to next diff chunk');
-_describe(
-  Shortcut.PREV_CHUNK,
-  ShortcutSection.DIFFS,
-  'Go to previous diff chunk'
-);
-_describe(
-  Shortcut.TOGGLE_ALL_DIFF_CONTEXT,
-  ShortcutSection.DIFFS,
-  'Toggle all diff context'
-);
-_describe(
-  Shortcut.NEXT_COMMENT_THREAD,
-  ShortcutSection.DIFFS,
-  'Go to next comment thread'
-);
-_describe(
-  Shortcut.PREV_COMMENT_THREAD,
-  ShortcutSection.DIFFS,
-  'Go to previous comment thread'
-);
-_describe(
-  Shortcut.EXPAND_ALL_COMMENT_THREADS,
-  ShortcutSection.DIFFS,
-  'Expand all comment threads'
-);
-_describe(
-  Shortcut.COLLAPSE_ALL_COMMENT_THREADS,
-  ShortcutSection.DIFFS,
-  'Collapse all comment threads'
-);
-_describe(
-  Shortcut.TOGGLE_HIDE_ALL_COMMENT_THREADS,
-  ShortcutSection.DIFFS,
-  'Hide/Display all comment threads'
-);
-_describe(Shortcut.LEFT_PANE, ShortcutSection.DIFFS, 'Select left pane');
-_describe(Shortcut.RIGHT_PANE, ShortcutSection.DIFFS, 'Select right pane');
-_describe(
-  Shortcut.TOGGLE_LEFT_PANE,
-  ShortcutSection.DIFFS,
-  'Hide/show left diff'
-);
-_describe(Shortcut.NEW_COMMENT, ShortcutSection.DIFFS, 'Draft new comment');
-_describe(Shortcut.SAVE_COMMENT, ShortcutSection.DIFFS, 'Save comment');
-_describe(
-  Shortcut.OPEN_DIFF_PREFS,
-  ShortcutSection.DIFFS,
-  'Show diff preferences'
-);
-_describe(
-  Shortcut.TOGGLE_DIFF_REVIEWED,
-  ShortcutSection.DIFFS,
-  'Mark/unmark file as reviewed'
-);
-_describe(
-  Shortcut.TOGGLE_DIFF_MODE,
-  ShortcutSection.DIFFS,
-  'Toggle unified/side-by-side diff'
-);
-_describe(
-  Shortcut.NEXT_UNREVIEWED_FILE,
-  ShortcutSection.DIFFS,
-  'Mark file as reviewed and go to next unreviewed file'
-);
-_describe(Shortcut.TOGGLE_BLAME, ShortcutSection.DIFFS, 'Toggle blame');
-
-_describe(Shortcut.NEXT_FILE, ShortcutSection.NAVIGATION, 'Go to next file');
-_describe(
-  Shortcut.PREV_FILE,
-  ShortcutSection.NAVIGATION,
-  'Go to previous file'
-);
-_describe(
-  Shortcut.NEXT_FILE_WITH_COMMENTS,
-  ShortcutSection.NAVIGATION,
-  'Go to next file that has comments'
-);
-_describe(
-  Shortcut.PREV_FILE_WITH_COMMENTS,
-  ShortcutSection.NAVIGATION,
-  'Go to previous file that has comments'
-);
-_describe(
-  Shortcut.OPEN_FIRST_FILE,
-  ShortcutSection.NAVIGATION,
-  'Go to first file'
-);
-_describe(
-  Shortcut.OPEN_LAST_FILE,
-  ShortcutSection.NAVIGATION,
-  'Go to last file'
-);
-_describe(
-  Shortcut.UP_TO_DASHBOARD,
-  ShortcutSection.NAVIGATION,
-  'Up to dashboard'
-);
-_describe(Shortcut.UP_TO_CHANGE, ShortcutSection.NAVIGATION, 'Up to change');
-
-_describe(
-  Shortcut.CURSOR_NEXT_FILE,
-  ShortcutSection.FILE_LIST,
-  'Select next file'
-);
-_describe(
-  Shortcut.CURSOR_PREV_FILE,
-  ShortcutSection.FILE_LIST,
-  'Select previous file'
-);
-_describe(Shortcut.OPEN_FILE, ShortcutSection.FILE_LIST, 'Go to selected file');
-_describe(
-  Shortcut.TOGGLE_ALL_INLINE_DIFFS,
-  ShortcutSection.FILE_LIST,
-  'Show/hide all inline diffs'
-);
-_describe(
-  Shortcut.TOGGLE_HIDE_ALL_COMMENT_THREADS,
-  ShortcutSection.FILE_LIST,
-  'Hide/Display all comment threads'
-);
-_describe(
-  Shortcut.TOGGLE_INLINE_DIFF,
-  ShortcutSection.FILE_LIST,
-  'Show/hide selected inline diff'
-);
-
-_describe(Shortcut.SEND_REPLY, ShortcutSection.REPLY_DIALOG, 'Send reply');
-_describe(
-  Shortcut.EMOJI_DROPDOWN,
-  ShortcutSection.REPLY_DIALOG,
-  'Emoji dropdown'
-);
-
-/**
- * Shortcut manager, holds all hosts, bindings and listeners.
- */
-export class ShortcutManager {
-  private readonly activeHosts = new Map<PolymerElement, Map<string, string>>();
-
-  private readonly bindings = new Map<Shortcut, string[]>();
-
-  public _testOnly_getBindings() {
-    return this.bindings;
-  }
-
-  public _testOnly_isEmpty() {
-    return this.activeHosts.size === 0 && this.listeners.size === 0;
-  }
-
-  private readonly listeners = new Set<ShortcutListener>();
-
-  bindShortcut(shortcut: Shortcut, ...bindings: string[]) {
-    this.bindings.set(shortcut, bindings);
-  }
-
-  getBindingsForShortcut(shortcut: Shortcut) {
-    return this.bindings.get(shortcut);
-  }
-
-  attachHost(host: PolymerElement, shortcuts: Map<string, string>) {
-    this.activeHosts.set(host, shortcuts);
-    this.notifyListeners();
-  }
-
-  detachHost(host: PolymerElement) {
-    if (this.activeHosts.delete(host)) {
-      this.notifyListeners();
-      return true;
-    }
-    return false;
-  }
-
-  addListener(listener: ShortcutListener) {
-    this.listeners.add(listener);
-    listener(this.directoryView());
-  }
-
-  removeListener(listener: ShortcutListener) {
-    return this.listeners.delete(listener);
-  }
-
-  getDescription(section: ShortcutSection, shortcutName: Shortcut) {
-    const bindings = _help.get(section);
-    let desc = '';
-    if (bindings) {
-      const binding = bindings.find(
-        binding => binding.shortcut === shortcutName
-      );
-      desc = binding ? binding.text : '';
-    }
-    return desc;
-  }
-
-  getShortcut(shortcutName: Shortcut) {
-    const bindings = this.bindings.get(shortcutName);
-    return bindings
-      ? bindings
-          .map(binding => this.describeBinding(binding).join('+'))
-          .join(',')
-      : '';
-  }
-
-  activeShortcutsBySection() {
-    const activeShortcuts = new Set<string>();
-    this.activeHosts.forEach(shortcuts => {
-      shortcuts.forEach((_, shortcut) => activeShortcuts.add(shortcut));
-    });
-
-    const activeShortcutsBySection = new Map<
-      ShortcutSection,
-      ShortcutHelpItem[]
-    >();
-    _help.forEach((shortcutList, section) => {
-      shortcutList.forEach(shortcutHelp => {
-        if (activeShortcuts.has(shortcutHelp.shortcut)) {
-          if (!activeShortcutsBySection.has(section)) {
-            activeShortcutsBySection.set(section, []);
-          }
-          // From previous condition, the `get(section)`
-          // should always return a valid result
-          activeShortcutsBySection.get(section)!.push(shortcutHelp);
-        }
-      });
-    });
-    return activeShortcutsBySection;
-  }
-
-  directoryView() {
-    const view = new Map<ShortcutSection, SectionView>();
-    this.activeShortcutsBySection().forEach((shortcutHelps, section) => {
-      const sectionView: Array<{binding: string[][]; text: string}> = [];
-      shortcutHelps.forEach(shortcutHelp => {
-        const bindingDesc = this.describeBindings(shortcutHelp.shortcut);
-        if (!bindingDesc) {
-          return;
-        }
-        this.distributeBindingDesc(bindingDesc).forEach(bindingDesc => {
-          sectionView.push({
-            binding: bindingDesc,
-            text: shortcutHelp.text,
-          });
-        });
-      });
-      view.set(section, sectionView);
-    });
-    return view;
-  }
-
-  distributeBindingDesc(bindingDesc: string[][]): string[][][] {
-    if (
-      bindingDesc.length === 1 ||
-      this.comboSetDisplayWidth(bindingDesc) < 21
-    ) {
-      return [bindingDesc];
-    }
-    // Find the largest prefix of bindings that is under the
-    // size threshold.
-    const head = [bindingDesc[0]];
-    for (let i = 1; i < bindingDesc.length; i++) {
-      head.push(bindingDesc[i]);
-      if (this.comboSetDisplayWidth(head) >= 21) {
-        head.pop();
-        return [head].concat(this.distributeBindingDesc(bindingDesc.slice(i)));
-      }
-    }
-    return [];
-  }
-
-  comboSetDisplayWidth(bindingDesc: string[][]) {
-    const bindingSizer = (binding: string[]) =>
-      binding.reduce((acc, key) => acc + key.length, 0);
-    // Width is the sum of strings + (n-1) * 2 to account for the word
-    // "or" joining them.
-    return (
-      bindingDesc.reduce((acc, binding) => acc + bindingSizer(binding), 0) +
-      2 * (bindingDesc.length - 1)
-    );
-  }
-
-  describeBindings(shortcut: Shortcut): string[][] | null {
-    const bindings = this.bindings.get(shortcut);
-    if (!bindings) {
-      return null;
-    }
-    if (bindings[0] === SPECIAL_SHORTCUT.GO_KEY) {
-      return bindings
-        .slice(1)
-        .map(binding => this._describeKey(binding))
-        .map(binding => ['g'].concat(binding));
-    }
-    if (bindings[0] === SPECIAL_SHORTCUT.V_KEY) {
-      return bindings
-        .slice(1)
-        .map(binding => this._describeKey(binding))
-        .map(binding => ['v'].concat(binding));
-    }
-
-    return bindings
-      .filter(binding => binding !== SPECIAL_SHORTCUT.DOC_ONLY)
-      .map(binding => this.describeBinding(binding));
-  }
-
-  _describeKey(key: string) {
-    switch (key) {
-      case 'shift':
-        return 'Shift';
-      case 'meta':
-        return 'Meta';
-      case 'ctrl':
-        return 'Ctrl';
-      case 'enter':
-        return 'Enter';
-      case 'up':
-        return '\u2191'; // ↑
-      case 'down':
-        return '\u2193'; // ↓
-      case 'left':
-        return '\u2190'; // ←
-      case 'right':
-        return '\u2192'; // →
-      default:
-        return key;
-    }
-  }
-
-  describeBinding(binding: string) {
-    // single key bindings
-    if (binding.length === 1) {
-      return [binding];
-    }
-    return binding
-      .split(':')[0]
-      .split('+')
-      .map(part => this._describeKey(part));
-  }
-
-  notifyListeners() {
-    const view = this.directoryView();
-    this.listeners.forEach(listener => listener(view));
-  }
-}
-
-const shortcutManager = new ShortcutManager();
-
 interface IronA11yKeysMixinConstructor {
   // Note: this is needed to have same interface as other mixins
   // eslint-disable-next-line @typescript-eslint/no-explicit-any
@@ -779,11 +81,7 @@
 
     ShortcutSection = ShortcutSection;
 
-    private _disableKeyboardShortcuts = false;
-
-    private readonly restApiService = appContext.restApiService;
-
-    private reporting = appContext.reportingService;
+    private readonly shortcuts = appContext.shortcutsService;
 
     /** Used to disable shortcuts when the element is not visible. */
     private observer?: IntersectionObserver;
@@ -802,76 +100,18 @@
     /** Are shortcuts currently enabled? True only when element is visible. */
     private bindingsEnabled = false;
 
-    modifierPressed(event: CustomKeyboardEvent) {
+    modifierPressed(e: IronKeyboardEvent) {
       /* We are checking for g/v as modifiers pressed. There are cases such as
        * pressing v and then /, where we want the handler for / to be triggered.
        * TODO(dhruvsri): find a way to support that keyboard combination
        */
-      const e = getKeyboardEvent(event);
       return (
         isModifierPressed(e) || !!this._inGoKeyMode() || !!this.inVKeyMode()
       );
     }
 
-    shouldSuppressKeyboardShortcut(event: CustomKeyboardEvent) {
-      if (this._disableKeyboardShortcuts) return true;
-      const e = getKeyboardEvent(event);
-      // TODO(TS): maybe override the EventApi, narrow it down to Element always
-      const target = (dom(e) as EventApi).rootTarget as Element;
-      const tagName = target.tagName;
-      const type = target.getAttribute('type');
-      if (
-        // Suppress shortcuts on <input> and <textarea>, but not on
-        // checkboxes, because we want to enable workflows like 'click
-        // mark-reviewed and then press ] to go to the next file'.
-        (tagName === 'INPUT' && type !== 'checkbox') ||
-        tagName === 'TEXTAREA' ||
-        // Suppress shortcuts if the key is 'enter'
-        // and target is an anchor or button or paper-tab.
-        (e.keyCode === 13 &&
-          (tagName === 'A' || tagName === 'BUTTON' || tagName === 'PAPER-TAB'))
-      ) {
-        return true;
-      }
-      for (let i = 0; e.path && i < e.path.length; i++) {
-        // TODO(TS): narrow this down to Element from EventTarget first
-        if ((e.path[i] as Element).tagName === 'GR-OVERLAY') {
-          return true;
-        }
-      }
-
-      // eg: {key: "k:keydown", ..., from: "gr-diff-view"}
-      let key = `${(e as unknown as KeyboardEvent).key}:${e.type}`;
-      if (this._inGoKeyMode()) key = 'g+' + key;
-      if (this.inVKeyMode()) key = 'v+' + key;
-      if (e.shiftKey) key = 'shift+' + key;
-      if (e.ctrlKey) key = 'ctrl+' + key;
-      if (e.metaKey) key = 'meta+' + key;
-      if (e.altKey) key = 'alt+' + key;
-      this.reporting.reportInteraction('shortcut-triggered', {
-        key,
-        from: this.nodeName ?? 'unknown',
-      });
-      return false;
-    }
-
-    // Alias for getKeyboardEvent.
-    getKeyboardEvent(e: CustomKeyboardEvent) {
-      return getKeyboardEvent(e);
-    }
-
-    bindShortcut(shortcut: Shortcut, ...bindings: string[]) {
-      shortcutManager.bindShortcut(shortcut, ...bindings);
-    }
-
-    createTitle(shortcutName: Shortcut, section: ShortcutSection) {
-      const desc = shortcutManager.getDescription(section, shortcutName);
-      const shortcut = shortcutManager.getShortcut(shortcutName);
-      return desc && shortcut ? `${desc} (shortcut: ${shortcut})` : '';
-    }
-
     _addOwnKeyBindings(shortcut: Shortcut, handler: string) {
-      const bindings = shortcutManager.getBindingsForShortcut(shortcut);
+      const bindings = this.shortcuts.getBindingsForShortcut(shortcut);
       if (!bindings) {
         return;
       }
@@ -896,11 +136,6 @@
 
     override connectedCallback() {
       super.connectedCallback();
-      this.restApiService.getPreferences().then(prefs => {
-        if (prefs?.disable_keyboard_shortcuts) {
-          this._disableKeyboardShortcuts = true;
-        }
-      });
       this.createVisibilityObserver();
       this.enableBindings();
     }
@@ -947,7 +182,7 @@
       const shortcuts = new Map<string, string>(
         Object.entries(this.keyboardShortcuts())
       );
-      shortcutManager.attachHost(this, shortcuts);
+      this.shortcuts.attachHost(this, shortcuts);
 
       for (const [key, value] of shortcuts.entries()) {
         this._addOwnKeyBindings(key as Shortcut, value);
@@ -983,7 +218,7 @@
     private disableBindings() {
       if (!this.bindingsEnabled) return;
       this.bindingsEnabled = false;
-      if (shortcutManager.detachHost(this)) {
+      if (this.shortcuts.detachHost(this)) {
         this.removeOwnKeyBindings();
       }
     }
@@ -996,16 +231,8 @@
       return {};
     }
 
-    addKeyboardShortcutDirectoryListener(listener: ShortcutListener) {
-      shortcutManager.addListener(listener);
-    }
-
-    removeKeyboardShortcutDirectoryListener(listener: ShortcutListener) {
-      shortcutManager.removeListener(listener);
-    }
-
-    _handleVKeyDown(e: CustomKeyboardEvent) {
-      if (this.shouldSuppressKeyboardShortcut(e)) return;
+    _handleVKeyDown(e: IronKeyboardEvent) {
+      if (this.shortcuts.shouldSuppress(e)) return;
       this._shortcut_v_key_last_pressed = Date.now();
     }
 
@@ -1022,11 +249,11 @@
       );
     }
 
-    _handleVAction(e: CustomKeyboardEvent) {
+    _handleVAction(e: IronKeyboardEvent) {
       if (
         !this.inVKeyMode() ||
         !this._shortcut_v_table.has(e.detail.key) ||
-        this.shouldSuppressKeyboardShortcut(e)
+        this.shortcuts.shouldSuppress(e)
       ) {
         return;
       }
@@ -1039,8 +266,8 @@
       }
     }
 
-    _handleGoKeyDown(e: CustomKeyboardEvent) {
-      if (this.shouldSuppressKeyboardShortcut(e)) return;
+    _handleGoKeyDown(e: IronKeyboardEvent) {
+      if (this.shortcuts.shouldSuppress(e)) return;
       this._shortcut_go_key_last_pressed = Date.now();
     }
 
@@ -1059,11 +286,11 @@
       );
     }
 
-    _handleGoAction(e: CustomKeyboardEvent) {
+    _handleGoAction(e: IronKeyboardEvent) {
       if (
         !this._inGoKeyMode() ||
         !this._shortcut_go_table.has(e.detail.key) ||
-        this.shouldSuppressKeyboardShortcut(e)
+        this.shortcuts.shouldSuppress(e)
       ) {
         return;
       }
@@ -1077,7 +304,10 @@
     }
   }
 
-  return Mixin as T & Constructor<KeyboardShortcutMixinInterface>;
+  return Mixin as T &
+    Constructor<
+      KeyboardShortcutMixinInterface & KeyboardShortcutMixinInterfaceTesting
+    >;
 };
 
 // The following doesn't work (IronA11yKeysBehavior crashes):
@@ -1090,7 +320,10 @@
 // This is a workaround
 export const KeyboardShortcutMixin = <T extends Constructor<PolymerElement>>(
   superClass: T
-): T & Constructor<KeyboardShortcutMixinInterface> =>
+): T &
+  Constructor<
+    KeyboardShortcutMixinInterface & KeyboardShortcutMixinInterfaceTesting
+  > =>
   InternalKeyboardShortcutMixin(
     // TODO(TS): mixinBehaviors in some lib is returning: `new () => T` instead
     // which will fail the type check due to missing IronA11yKeysBehavior interface
@@ -1100,21 +333,14 @@
 
 /** The interface corresponding to KeyboardShortcutMixin */
 export interface KeyboardShortcutMixinInterface {
-  Shortcut: typeof Shortcut;
-  ShortcutSection: typeof ShortcutSection;
+  keyboardShortcuts(): {[key: string]: string | null};
+  modifierPressed(event: IronKeyboardEvent): boolean;
+}
+
+export interface KeyboardShortcutMixinInterfaceTesting {
   _shortcut_go_key_last_pressed: number | null;
   _shortcut_v_key_last_pressed: number | null;
   _shortcut_go_table: Map<string, string>;
   _shortcut_v_table: Map<string, string>;
-  keyboardShortcuts(): {[key: string]: string | null};
-  createTitle(name: Shortcut, section: ShortcutSection): string;
-  bindShortcut(shortcut: Shortcut, ...bindings: string[]): void;
-  shouldSuppressKeyboardShortcut(event: CustomKeyboardEvent): boolean;
-  modifierPressed(event: CustomKeyboardEvent): boolean;
-  addKeyboardShortcutDirectoryListener(listener: ShortcutListener): void;
-  removeKeyboardShortcutDirectoryListener(listener: ShortcutListener): void;
-}
-
-export function _testOnly_getShortcutManagerInstance() {
-  return shortcutManager;
+  _handleGoAction: (e: IronKeyboardEvent) => void;
 }
diff --git a/polygerrit-ui/app/mixins/keyboard-shortcut-mixin/keyboard-shortcut-mixin_test.js b/polygerrit-ui/app/mixins/keyboard-shortcut-mixin/keyboard-shortcut-mixin_test.js
deleted file mode 100644
index 4536ecd..0000000
--- a/polygerrit-ui/app/mixins/keyboard-shortcut-mixin/keyboard-shortcut-mixin_test.js
+++ /dev/null
@@ -1,424 +0,0 @@
-/**
- * @license
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-import '../../test/common-test-setup-karma.js';
-import {
-  KeyboardShortcutMixin, Shortcut,
-  ShortcutManager, ShortcutSection, SPECIAL_SHORTCUT,
-} from './keyboard-shortcut-mixin.js';
-import {html} from '@polymer/polymer/lib/utils/html-tag.js';
-import {PolymerElement} from '@polymer/polymer/polymer-element.js';
-import {mockPromise} from '../../test/test-utils.js';
-
-const basicFixture =
-    fixtureFromElement('keyboard-shortcut-mixin-test-element');
-
-const withinOverlayFixture = fixtureFromTemplate(html`
-<gr-overlay>
-  <keyboard-shortcut-mixin-test-element>
-  </keyboard-shortcut-mixin-test-element>
-</gr-overlay>
-`);
-
-class GrKeyboardShortcutMixinTestElement extends
-  KeyboardShortcutMixin(PolymerElement) {
-  static get is() {
-    return 'keyboard-shortcut-mixin-test-element';
-  }
-
-  get keyBindings() {
-    return {
-      k: '_handleKey',
-      enter: '_handleKey',
-    };
-  }
-
-  _handleKey() {}
-}
-
-customElements.define(GrKeyboardShortcutMixinTestElement.is,
-    GrKeyboardShortcutMixinTestElement);
-
-suite('keyboard-shortcut-mixin tests', () => {
-  let element;
-  let overlay;
-
-  setup(() => {
-    element = basicFixture.instantiate();
-    overlay = withinOverlayFixture.instantiate();
-  });
-
-  suite('ShortcutManager', () => {
-    test('bindings management', () => {
-      const mgr = new ShortcutManager();
-      const NEXT_FILE = Shortcut.NEXT_FILE;
-
-      assert.isUndefined(mgr.getBindingsForShortcut(NEXT_FILE));
-      mgr.bindShortcut(NEXT_FILE, ']', '}', 'right');
-      assert.deepEqual(
-          mgr.getBindingsForShortcut(NEXT_FILE),
-          [']', '}', 'right']);
-    });
-
-    test('getShortcut', () => {
-      const mgr = new ShortcutManager();
-      const NEXT_FILE = Shortcut.NEXT_FILE;
-
-      assert.isUndefined(mgr.getBindingsForShortcut(NEXT_FILE));
-      mgr.bindShortcut(NEXT_FILE, ']', '}', 'right');
-      assert.equal(mgr.getShortcut(NEXT_FILE), '],},→');
-    });
-
-    test('getShortcut with modifiers', () => {
-      const mgr = new ShortcutManager();
-      const NEXT_FILE = Shortcut.NEXT_FILE;
-
-      assert.isUndefined(mgr.getBindingsForShortcut(NEXT_FILE));
-      mgr.bindShortcut(NEXT_FILE, 'Shift+a:key');
-      assert.equal(mgr.getShortcut(NEXT_FILE), 'Shift+a');
-    });
-
-    suite('binding descriptions', () => {
-      function mapToObject(m) {
-        const o = {};
-        m.forEach((v, k) => o[k] = v);
-        return o;
-      }
-
-      test('single combo description', () => {
-        const mgr = new ShortcutManager();
-        assert.deepEqual(mgr.describeBinding('a'), ['a']);
-        assert.deepEqual(mgr.describeBinding('a:keyup'), ['a']);
-        assert.deepEqual(mgr.describeBinding('ctrl+a'), ['Ctrl', 'a']);
-        assert.deepEqual(
-            mgr.describeBinding('ctrl+shift+up:keyup'),
-            ['Ctrl', 'Shift', '↑']);
-      });
-
-      test('combo set description', () => {
-        const mgr = new ShortcutManager();
-        assert.isNull(mgr.describeBindings(Shortcut.NEXT_FILE));
-
-        mgr.bindShortcut(Shortcut.GO_TO_OPENED_CHANGES,
-            SPECIAL_SHORTCUT.GO_KEY, 'o');
-        assert.deepEqual(
-            mgr.describeBindings(Shortcut.GO_TO_OPENED_CHANGES),
-            [['g', 'o']]);
-
-        mgr.bindShortcut(Shortcut.NEXT_FILE, SPECIAL_SHORTCUT.DOC_ONLY,
-            ']', 'ctrl+shift+right:keyup');
-        assert.deepEqual(
-            mgr.describeBindings(Shortcut.NEXT_FILE),
-            [[']'], ['Ctrl', 'Shift', '→']]);
-
-        mgr.bindShortcut(Shortcut.PREV_FILE, '[');
-        assert.deepEqual(mgr.describeBindings(Shortcut.PREV_FILE), [['[']]);
-      });
-
-      test('combo set description width', () => {
-        const mgr = new ShortcutManager();
-        assert.strictEqual(mgr.comboSetDisplayWidth([['u']]), 1);
-        assert.strictEqual(mgr.comboSetDisplayWidth([['g', 'o']]), 2);
-        assert.strictEqual(mgr.comboSetDisplayWidth([['Shift', 'r']]), 6);
-        assert.strictEqual(mgr.comboSetDisplayWidth([['x'], ['y']]), 4);
-        assert.strictEqual(
-            mgr.comboSetDisplayWidth([['x'], ['y'], ['Shift', 'z']]),
-            12);
-      });
-
-      test('distribute shortcut help', () => {
-        const mgr = new ShortcutManager();
-        assert.deepEqual(mgr.distributeBindingDesc([['o']]), [[['o']]]);
-        assert.deepEqual(
-            mgr.distributeBindingDesc([['g', 'o']]),
-            [[['g', 'o']]]);
-        assert.deepEqual(
-            mgr.distributeBindingDesc([['ctrl', 'shift', 'meta', 'enter']]),
-            [[['ctrl', 'shift', 'meta', 'enter']]]);
-        assert.deepEqual(
-            mgr.distributeBindingDesc([
-              ['ctrl', 'shift', 'meta', 'enter'],
-              ['o'],
-            ]),
-            [
-              [['ctrl', 'shift', 'meta', 'enter']],
-              [['o']],
-            ]);
-        assert.deepEqual(
-            mgr.distributeBindingDesc([
-              ['ctrl', 'enter'],
-              ['meta', 'enter'],
-              ['ctrl', 's'],
-              ['meta', 's'],
-            ]),
-            [
-              [['ctrl', 'enter'], ['meta', 'enter']],
-              [['ctrl', 's'], ['meta', 's']],
-            ]);
-      });
-
-      test('active shortcuts by section', () => {
-        const mgr = new ShortcutManager();
-        mgr.bindShortcut(Shortcut.NEXT_FILE, ']');
-        mgr.bindShortcut(Shortcut.NEXT_LINE, 'j');
-        mgr.bindShortcut(Shortcut.GO_TO_OPENED_CHANGES, 'g+o');
-        mgr.bindShortcut(Shortcut.SEARCH, '/');
-
-        assert.deepEqual(
-            mapToObject(mgr.activeShortcutsBySection()),
-            {});
-
-        mgr.attachHost({}, new Map([[Shortcut.NEXT_FILE, null]]));
-        assert.deepEqual(
-            mapToObject(mgr.activeShortcutsBySection()),
-            {
-              [ShortcutSection.NAVIGATION]: [
-                {shortcut: Shortcut.NEXT_FILE, text: 'Go to next file'},
-              ],
-            });
-
-        mgr.attachHost({}, new Map([[Shortcut.NEXT_LINE, null]]));
-        assert.deepEqual(
-            mapToObject(mgr.activeShortcutsBySection()),
-            {
-              [ShortcutSection.DIFFS]: [
-                {shortcut: Shortcut.NEXT_LINE, text: 'Go to next line'},
-              ],
-              [ShortcutSection.NAVIGATION]: [
-                {shortcut: Shortcut.NEXT_FILE, text: 'Go to next file'},
-              ],
-            });
-
-        mgr.attachHost({}, new Map([
-          [Shortcut.SEARCH, null],
-          [Shortcut.GO_TO_OPENED_CHANGES, null],
-        ]));
-        assert.deepEqual(
-            mapToObject(mgr.activeShortcutsBySection()),
-            {
-              [ShortcutSection.DIFFS]: [
-                {shortcut: Shortcut.NEXT_LINE, text: 'Go to next line'},
-              ],
-              [ShortcutSection.EVERYWHERE]: [
-                {shortcut: Shortcut.SEARCH, text: 'Search'},
-                {
-                  shortcut: Shortcut.GO_TO_OPENED_CHANGES,
-                  text: 'Go to Opened Changes',
-                },
-              ],
-              [ShortcutSection.NAVIGATION]: [
-                {shortcut: Shortcut.NEXT_FILE, text: 'Go to next file'},
-              ],
-            });
-      });
-
-      test('directory view', () => {
-        const mgr = new ShortcutManager();
-        mgr.bindShortcut(Shortcut.NEXT_FILE, ']');
-        mgr.bindShortcut(Shortcut.NEXT_LINE, 'j');
-        mgr.bindShortcut(Shortcut.GO_TO_OPENED_CHANGES,
-            SPECIAL_SHORTCUT.GO_KEY, 'o');
-        mgr.bindShortcut(Shortcut.SEARCH, '/');
-        mgr.bindShortcut(
-            Shortcut.SAVE_COMMENT, 'ctrl+enter', 'meta+enter',
-            'ctrl+s', 'meta+s');
-
-        assert.deepEqual(mapToObject(mgr.directoryView()), {});
-
-        mgr.attachHost({}, new Map([
-          [Shortcut.GO_TO_OPENED_CHANGES, null],
-          [Shortcut.NEXT_FILE, null],
-          [Shortcut.NEXT_LINE, null],
-          [Shortcut.SAVE_COMMENT, null],
-          [Shortcut.SEARCH, null],
-        ]));
-        assert.deepEqual(
-            mapToObject(mgr.directoryView()),
-            {
-              [ShortcutSection.DIFFS]: [
-                {binding: [['j']], text: 'Go to next line'},
-                {
-                  binding: [['Ctrl', 'Enter'], ['Meta', 'Enter']],
-                  text: 'Save comment',
-                },
-                {
-                  binding: [['Ctrl', 's'], ['Meta', 's']],
-                  text: 'Save comment',
-                },
-              ],
-              [ShortcutSection.EVERYWHERE]: [
-                {binding: [['/']], text: 'Search'},
-                {binding: [['g', 'o']], text: 'Go to Opened Changes'},
-              ],
-              [ShortcutSection.NAVIGATION]: [
-                {binding: [[']']], text: 'Go to next file'},
-              ],
-            });
-      });
-    });
-  });
-
-  test('doesn’t block kb shortcuts for non-allowed els', async () => {
-    const divEl = document.createElement('div');
-    element.appendChild(divEl);
-    const promise = mockPromise();
-    element._handleKey = e => {
-      assert.isFalse(element.shouldSuppressKeyboardShortcut(e));
-      promise.resolve();
-    };
-    MockInteractions.keyDownOn(divEl, 75, null, 'k');
-    await promise;
-  });
-
-  test('blocks kb shortcuts for input els', async () => {
-    const inputEl = document.createElement('input');
-    element.appendChild(inputEl);
-    const promise = mockPromise();
-    element._handleKey = e => {
-      assert.isTrue(element.shouldSuppressKeyboardShortcut(e));
-      promise.resolve();
-    };
-    MockInteractions.keyDownOn(inputEl, 75, null, 'k');
-    await promise;
-  });
-
-  test('doesn’t block kb shortcuts for checkboxes', async () => {
-    const inputEl = document.createElement('input');
-    inputEl.setAttribute('type', 'checkbox');
-    element.appendChild(inputEl);
-    const promise = mockPromise();
-    element._handleKey = e => {
-      assert.isFalse(element.shouldSuppressKeyboardShortcut(e));
-      promise.resolve();
-    };
-    MockInteractions.keyDownOn(inputEl, 75, null, 'k');
-    await promise;
-  });
-
-  test('blocks kb shortcuts for textarea els', async () => {
-    const textareaEl = document.createElement('textarea');
-    element.appendChild(textareaEl);
-    const promise = mockPromise();
-    element._handleKey = e => {
-      assert.isTrue(element.shouldSuppressKeyboardShortcut(e));
-      promise.resolve();
-    };
-    MockInteractions.keyDownOn(textareaEl, 75, null, 'k');
-    await promise;
-  });
-
-  test('blocks kb shortcuts for anything in a gr-overlay', async () => {
-    const divEl = document.createElement('div');
-    const element =
-        overlay.querySelector('keyboard-shortcut-mixin-test-element');
-    element.appendChild(divEl);
-    const promise = mockPromise();
-    element._handleKey = e => {
-      assert.isTrue(element.shouldSuppressKeyboardShortcut(e));
-      promise.resolve();
-    };
-    MockInteractions.keyDownOn(divEl, 75, null, 'k');
-    await promise;
-  });
-
-  test('blocks enter shortcut on an anchor', async () => {
-    const anchorEl = document.createElement('a');
-    const element =
-        overlay.querySelector('keyboard-shortcut-mixin-test-element');
-    element.appendChild(anchorEl);
-    const promise = mockPromise();
-    element._handleKey = e => {
-      assert.isTrue(element.shouldSuppressKeyboardShortcut(e));
-      promise.resolve();
-    };
-    MockInteractions.keyDownOn(anchorEl, 13, null, 'enter');
-    await promise;
-  });
-
-  test('modifierPressed returns accurate values', () => {
-    const spy = sinon.spy(element, 'modifierPressed');
-    element._handleKey = e => {
-      element.modifierPressed(e);
-    };
-    MockInteractions.keyDownOn(element, 75, 'shift', 'k');
-    assert.isTrue(spy.lastCall.returnValue);
-    MockInteractions.keyDownOn(element, 75, null, 'k');
-    assert.isFalse(spy.lastCall.returnValue);
-    MockInteractions.keyDownOn(element, 75, 'ctrl', 'k');
-    assert.isTrue(spy.lastCall.returnValue);
-    MockInteractions.keyDownOn(element, 75, null, 'k');
-    assert.isFalse(spy.lastCall.returnValue);
-    MockInteractions.keyDownOn(element, 75, 'meta', 'k');
-    assert.isTrue(spy.lastCall.returnValue);
-    MockInteractions.keyDownOn(element, 75, null, 'k');
-    assert.isFalse(spy.lastCall.returnValue);
-    MockInteractions.keyDownOn(element, 75, 'alt', 'k');
-    assert.isTrue(spy.lastCall.returnValue);
-  });
-
-  suite('GO_KEY timing', () => {
-    let handlerStub;
-
-    setup(() => {
-      element._shortcut_go_table.set('a', '_handleA');
-      handlerStub = element._handleA = sinon.stub();
-      sinon.stub(Date, 'now').returns(10000);
-    });
-
-    test('success', () => {
-      const e = {detail: {key: 'a'}, preventDefault: () => {}};
-      sinon.stub(element, 'shouldSuppressKeyboardShortcut').returns(false);
-      element._shortcut_go_key_last_pressed = 9000;
-      element._handleGoAction(e);
-      assert.isTrue(handlerStub.calledOnce);
-      assert.strictEqual(handlerStub.lastCall.args[0], e);
-    });
-
-    test('go key not pressed', () => {
-      const e = {detail: {key: 'a'}, preventDefault: () => {}};
-      sinon.stub(element, 'shouldSuppressKeyboardShortcut').returns(false);
-      element._shortcut_go_key_last_pressed = null;
-      element._handleGoAction(e);
-      assert.isFalse(handlerStub.called);
-    });
-
-    test('go key pressed too long ago', () => {
-      const e = {detail: {key: 'a'}, preventDefault: () => {}};
-      sinon.stub(element, 'shouldSuppressKeyboardShortcut').returns(false);
-      element._shortcut_go_key_last_pressed = 3000;
-      element._handleGoAction(e);
-      assert.isFalse(handlerStub.called);
-    });
-
-    test('should suppress', () => {
-      const e = {detail: {key: 'a'}, preventDefault: () => {}};
-      sinon.stub(element, 'shouldSuppressKeyboardShortcut').returns(true);
-      element._shortcut_go_key_last_pressed = 9000;
-      element._handleGoAction(e);
-      assert.isFalse(handlerStub.called);
-    });
-
-    test('unrecognized key', () => {
-      const e = {detail: {key: 'f'}, preventDefault: () => {}};
-      sinon.stub(element, 'shouldSuppressKeyboardShortcut').returns(false);
-      element._shortcut_go_key_last_pressed = 9000;
-      element._handleGoAction(e);
-      assert.isFalse(handlerStub.called);
-    });
-  });
-});
-
diff --git a/polygerrit-ui/app/mixins/keyboard-shortcut-mixin/keyboard-shortcut-mixin_test.ts b/polygerrit-ui/app/mixins/keyboard-shortcut-mixin/keyboard-shortcut-mixin_test.ts
new file mode 100644
index 0000000..01ad6cc
--- /dev/null
+++ b/polygerrit-ui/app/mixins/keyboard-shortcut-mixin/keyboard-shortcut-mixin_test.ts
@@ -0,0 +1,139 @@
+/**
+ * @license
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import '../../test/common-test-setup-karma';
+import {KeyboardShortcutMixin} from './keyboard-shortcut-mixin';
+import {PolymerElement} from '@polymer/polymer/polymer-element';
+import '../../elements/shared/gr-overlay/gr-overlay';
+import * as MockInteractions from '@polymer/iron-test-helpers/mock-interactions';
+import {IronKeyboardEvent} from '../../types/events';
+
+class GrKeyboardShortcutMixinTestElement extends KeyboardShortcutMixin(
+  PolymerElement
+) {
+  static get is() {
+    return 'keyboard-shortcut-mixin-test-element';
+  }
+
+  get keyBindings() {
+    return {
+      k: '_handleKey',
+      enter: '_handleKey',
+    };
+  }
+
+  _handleKey(_: any) {}
+
+  _handleA(_: any) {}
+}
+
+declare global {
+  interface HTMLElementTagNameMap {
+    'keyboard-shortcut-mixin-test-element': GrKeyboardShortcutMixinTestElement;
+  }
+}
+
+customElements.define(
+  GrKeyboardShortcutMixinTestElement.is,
+  GrKeyboardShortcutMixinTestElement
+);
+
+const basicFixture = fixtureFromElement('keyboard-shortcut-mixin-test-element');
+
+suite('keyboard-shortcut-mixin tests', () => {
+  let element: GrKeyboardShortcutMixinTestElement;
+
+  setup(async () => {
+    element = basicFixture.instantiate();
+    await flush();
+  });
+
+  test('modifierPressed returns accurate values', () => {
+    const spy = sinon.spy(element, 'modifierPressed');
+    element._handleKey = e => {
+      element.modifierPressed(e);
+    };
+    MockInteractions.keyDownOn(element, 75, 'shift', 'k');
+    assert.isTrue(spy.lastCall.returnValue);
+    MockInteractions.keyDownOn(element, 75, null, 'k');
+    assert.isFalse(spy.lastCall.returnValue);
+    MockInteractions.keyDownOn(element, 75, 'ctrl', 'k');
+    assert.isTrue(spy.lastCall.returnValue);
+    MockInteractions.keyDownOn(element, 75, null, 'k');
+    assert.isFalse(spy.lastCall.returnValue);
+    MockInteractions.keyDownOn(element, 75, 'meta', 'k');
+    assert.isTrue(spy.lastCall.returnValue);
+    MockInteractions.keyDownOn(element, 75, null, 'k');
+    assert.isFalse(spy.lastCall.returnValue);
+    MockInteractions.keyDownOn(element, 75, 'alt', 'k');
+    assert.isTrue(spy.lastCall.returnValue);
+  });
+
+  suite('GO_KEY timing', () => {
+    let handlerStub: sinon.SinonStub;
+
+    setup(() => {
+      element._shortcut_go_table.set('a', '_handleA');
+      handlerStub = element._handleA = sinon.stub();
+      sinon.stub(Date, 'now').returns(10000);
+    });
+
+    test('success', () => {
+      const e = {
+        detail: {key: 'a'},
+        preventDefault: () => {},
+        composedPath: () => [],
+      } as unknown as IronKeyboardEvent;
+      element._shortcut_go_key_last_pressed = 9000;
+      element._handleGoAction(e);
+      assert.isTrue(handlerStub.calledOnce);
+      assert.strictEqual(handlerStub.lastCall.args[0], e);
+    });
+
+    test('go key not pressed', () => {
+      const e = {
+        detail: {key: 'a'},
+        preventDefault: () => {},
+        composedPath: () => [],
+      } as unknown as IronKeyboardEvent;
+      element._shortcut_go_key_last_pressed = null;
+      element._handleGoAction(e);
+      assert.isFalse(handlerStub.called);
+    });
+
+    test('go key pressed too long ago', () => {
+      const e = {
+        detail: {key: 'a'},
+        preventDefault: () => {},
+        composedPath: () => [],
+      } as unknown as IronKeyboardEvent;
+      element._shortcut_go_key_last_pressed = 3000;
+      element._handleGoAction(e);
+      assert.isFalse(handlerStub.called);
+    });
+
+    test('unrecognized key', () => {
+      const e = {
+        detail: {key: 'f'},
+        preventDefault: () => {},
+        composedPath: () => [],
+      } as unknown as IronKeyboardEvent;
+      element._shortcut_go_key_last_pressed = 9000;
+      element._handleGoAction(e);
+      assert.isFalse(handlerStub.called);
+    });
+  });
+});
diff --git a/polygerrit-ui/app/services/app-context-init.ts b/polygerrit-ui/app/services/app-context-init.ts
index ade9529..3a6f7c5 100644
--- a/polygerrit-ui/app/services/app-context-init.ts
+++ b/polygerrit-ui/app/services/app-context-init.ts
@@ -27,6 +27,7 @@
 import {ConfigService} from './config/config-service';
 import {UserService} from './user/user-service';
 import {CommentsService} from './comments/comments-service';
+import {ShortcutsService} from './shortcuts/shortcuts-service';
 
 type ServiceName = keyof AppContext;
 type ServiceCreator<T> = () => T;
@@ -82,5 +83,6 @@
     storageService: () => new GrStorageService(),
     configService: () => new ConfigService(),
     userService: () => new UserService(appContext.restApiService),
+    shortcutsService: () => new ShortcutsService(appContext.reportingService),
   });
 }
diff --git a/polygerrit-ui/app/services/app-context.ts b/polygerrit-ui/app/services/app-context.ts
index 161378d..e5828d6 100644
--- a/polygerrit-ui/app/services/app-context.ts
+++ b/polygerrit-ui/app/services/app-context.ts
@@ -26,6 +26,7 @@
 import {ConfigService} from './config/config-service';
 import {UserService} from './user/user-service';
 import {CommentsService} from './comments/comments-service';
+import {ShortcutsService} from './shortcuts/shortcuts-service';
 
 export interface AppContext {
   flagsService: FlagsService;
@@ -40,6 +41,7 @@
   storageService: StorageService;
   configService: ConfigService;
   userService: UserService;
+  shortcutsService: ShortcutsService;
 }
 
 /**
diff --git a/polygerrit-ui/app/services/shortcuts/shortcuts-config.ts b/polygerrit-ui/app/services/shortcuts/shortcuts-config.ts
new file mode 100644
index 0000000..bd004d7
--- /dev/null
+++ b/polygerrit-ui/app/services/shortcuts/shortcuts-config.ts
@@ -0,0 +1,552 @@
+/**
+ * @license
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/** Enum for all special shortcuts */
+export enum SPECIAL_SHORTCUT {
+  DOC_ONLY = 'DOC_ONLY',
+  GO_KEY = 'GO_KEY',
+  V_KEY = 'V_KEY',
+}
+
+/**
+ * Enum for all shortcut sections, where that shortcut should be applied to.
+ */
+export enum ShortcutSection {
+  ACTIONS = 'Actions',
+  DIFFS = 'Diffs',
+  EVERYWHERE = 'Global Shortcuts',
+  FILE_LIST = 'File list',
+  NAVIGATION = 'Navigation',
+  REPLY_DIALOG = 'Reply dialog',
+}
+
+/**
+ * Enum for all possible shortcut names.
+ */
+export enum Shortcut {
+  OPEN_SHORTCUT_HELP_DIALOG = 'OPEN_SHORTCUT_HELP_DIALOG',
+  GO_TO_USER_DASHBOARD = 'GO_TO_USER_DASHBOARD',
+  GO_TO_OPENED_CHANGES = 'GO_TO_OPENED_CHANGES',
+  GO_TO_MERGED_CHANGES = 'GO_TO_MERGED_CHANGES',
+  GO_TO_ABANDONED_CHANGES = 'GO_TO_ABANDONED_CHANGES',
+  GO_TO_WATCHED_CHANGES = 'GO_TO_WATCHED_CHANGES',
+
+  CURSOR_NEXT_CHANGE = 'CURSOR_NEXT_CHANGE',
+  CURSOR_PREV_CHANGE = 'CURSOR_PREV_CHANGE',
+  OPEN_CHANGE = 'OPEN_CHANGE',
+  NEXT_PAGE = 'NEXT_PAGE',
+  PREV_PAGE = 'PREV_PAGE',
+  TOGGLE_CHANGE_REVIEWED = 'TOGGLE_CHANGE_REVIEWED',
+  TOGGLE_CHANGE_STAR = 'TOGGLE_CHANGE_STAR',
+  REFRESH_CHANGE_LIST = 'REFRESH_CHANGE_LIST',
+  OPEN_SUBMIT_DIALOG = 'OPEN_SUBMIT_DIALOG',
+  TOGGLE_ATTENTION_SET = 'TOGGLE_ATTENTION_SET',
+
+  OPEN_REPLY_DIALOG = 'OPEN_REPLY_DIALOG',
+  OPEN_DOWNLOAD_DIALOG = 'OPEN_DOWNLOAD_DIALOG',
+  EXPAND_ALL_MESSAGES = 'EXPAND_ALL_MESSAGES',
+  COLLAPSE_ALL_MESSAGES = 'COLLAPSE_ALL_MESSAGES',
+  UP_TO_DASHBOARD = 'UP_TO_DASHBOARD',
+  UP_TO_CHANGE = 'UP_TO_CHANGE',
+  TOGGLE_DIFF_MODE = 'TOGGLE_DIFF_MODE',
+  REFRESH_CHANGE = 'REFRESH_CHANGE',
+  EDIT_TOPIC = 'EDIT_TOPIC',
+  DIFF_AGAINST_BASE = 'DIFF_AGAINST_BASE',
+  DIFF_AGAINST_LATEST = 'DIFF_AGAINST_LATEST',
+  DIFF_BASE_AGAINST_LEFT = 'DIFF_BASE_AGAINST_LEFT',
+  DIFF_RIGHT_AGAINST_LATEST = 'DIFF_RIGHT_AGAINST_LATEST',
+  DIFF_BASE_AGAINST_LATEST = 'DIFF_BASE_AGAINST_LATEST',
+
+  NEXT_LINE = 'NEXT_LINE',
+  PREV_LINE = 'PREV_LINE',
+  VISIBLE_LINE = 'VISIBLE_LINE',
+  NEXT_CHUNK = 'NEXT_CHUNK',
+  PREV_CHUNK = 'PREV_CHUNK',
+  TOGGLE_ALL_DIFF_CONTEXT = 'TOGGLE_ALL_DIFF_CONTEXT',
+  NEXT_COMMENT_THREAD = 'NEXT_COMMENT_THREAD',
+  PREV_COMMENT_THREAD = 'PREV_COMMENT_THREAD',
+  EXPAND_ALL_COMMENT_THREADS = 'EXPAND_ALL_COMMENT_THREADS',
+  COLLAPSE_ALL_COMMENT_THREADS = 'COLLAPSE_ALL_COMMENT_THREADS',
+  LEFT_PANE = 'LEFT_PANE',
+  RIGHT_PANE = 'RIGHT_PANE',
+  TOGGLE_LEFT_PANE = 'TOGGLE_LEFT_PANE',
+  NEW_COMMENT = 'NEW_COMMENT',
+  SAVE_COMMENT = 'SAVE_COMMENT',
+  OPEN_DIFF_PREFS = 'OPEN_DIFF_PREFS',
+  TOGGLE_DIFF_REVIEWED = 'TOGGLE_DIFF_REVIEWED',
+
+  NEXT_FILE = 'NEXT_FILE',
+  PREV_FILE = 'PREV_FILE',
+  NEXT_FILE_WITH_COMMENTS = 'NEXT_FILE_WITH_COMMENTS',
+  PREV_FILE_WITH_COMMENTS = 'PREV_FILE_WITH_COMMENTS',
+  NEXT_UNREVIEWED_FILE = 'NEXT_UNREVIEWED_FILE',
+  CURSOR_NEXT_FILE = 'CURSOR_NEXT_FILE',
+  CURSOR_PREV_FILE = 'CURSOR_PREV_FILE',
+  OPEN_FILE = 'OPEN_FILE',
+  TOGGLE_FILE_REVIEWED = 'TOGGLE_FILE_REVIEWED',
+  TOGGLE_ALL_INLINE_DIFFS = 'TOGGLE_ALL_INLINE_DIFFS',
+  TOGGLE_INLINE_DIFF = 'TOGGLE_INLINE_DIFF',
+  TOGGLE_HIDE_ALL_COMMENT_THREADS = 'TOGGLE_HIDE_ALL_COMMENT_THREADS',
+  OPEN_FILE_LIST = 'OPEN_FILE_LIST',
+
+  OPEN_FIRST_FILE = 'OPEN_FIRST_FILE',
+  OPEN_LAST_FILE = 'OPEN_LAST_FILE',
+
+  SEARCH = 'SEARCH',
+  SEND_REPLY = 'SEND_REPLY',
+  EMOJI_DROPDOWN = 'EMOJI_DROPDOWN',
+  TOGGLE_BLAME = 'TOGGLE_BLAME',
+}
+
+export interface ShortcutHelpItem {
+  shortcut: Shortcut;
+  text: string;
+  bindings: string[];
+}
+
+export const config = new Map<ShortcutSection, ShortcutHelpItem[]>();
+
+function describe(
+  shortcut: Shortcut,
+  section: ShortcutSection,
+  text: string,
+  binding: string,
+  ...moreBindings: string[]
+) {
+  if (!config.has(section)) {
+    config.set(section, []);
+  }
+  const shortcuts = config.get(section);
+  if (shortcuts) {
+    shortcuts.push({shortcut, text, bindings: [binding, ...moreBindings]});
+  }
+}
+
+describe(Shortcut.SEARCH, ShortcutSection.EVERYWHERE, 'Search', '/');
+describe(
+  Shortcut.OPEN_SHORTCUT_HELP_DIALOG,
+  ShortcutSection.EVERYWHERE,
+  'Show this dialog',
+  '?'
+);
+describe(
+  Shortcut.GO_TO_USER_DASHBOARD,
+  ShortcutSection.EVERYWHERE,
+  'Go to User Dashboard',
+  SPECIAL_SHORTCUT.GO_KEY,
+  'i'
+);
+describe(
+  Shortcut.GO_TO_OPENED_CHANGES,
+  ShortcutSection.EVERYWHERE,
+  'Go to Opened Changes',
+  SPECIAL_SHORTCUT.GO_KEY,
+  'o'
+);
+describe(
+  Shortcut.GO_TO_MERGED_CHANGES,
+  ShortcutSection.EVERYWHERE,
+  'Go to Merged Changes',
+  SPECIAL_SHORTCUT.GO_KEY,
+  'm'
+);
+describe(
+  Shortcut.GO_TO_ABANDONED_CHANGES,
+  ShortcutSection.EVERYWHERE,
+  'Go to Abandoned Changes',
+  SPECIAL_SHORTCUT.GO_KEY,
+  'a'
+);
+describe(
+  Shortcut.GO_TO_WATCHED_CHANGES,
+  ShortcutSection.EVERYWHERE,
+  'Go to Watched Changes',
+  SPECIAL_SHORTCUT.GO_KEY,
+  'w'
+);
+
+describe(
+  Shortcut.CURSOR_NEXT_CHANGE,
+  ShortcutSection.ACTIONS,
+  'Select next change',
+  'j'
+);
+describe(
+  Shortcut.CURSOR_PREV_CHANGE,
+  ShortcutSection.ACTIONS,
+  'Select previous change',
+  'k'
+);
+describe(
+  Shortcut.OPEN_CHANGE,
+  ShortcutSection.ACTIONS,
+  'Show selected change',
+  'o'
+);
+describe(
+  Shortcut.NEXT_PAGE,
+  ShortcutSection.ACTIONS,
+  'Go to next page',
+  'n',
+  ']'
+);
+describe(
+  Shortcut.PREV_PAGE,
+  ShortcutSection.ACTIONS,
+  'Go to previous page',
+  'p',
+  '['
+);
+describe(
+  Shortcut.OPEN_REPLY_DIALOG,
+  ShortcutSection.ACTIONS,
+  'Open reply dialog to publish comments and add reviewers',
+  'a:keyup'
+);
+describe(
+  Shortcut.OPEN_DOWNLOAD_DIALOG,
+  ShortcutSection.ACTIONS,
+  'Open download overlay',
+  'd:keyup'
+);
+describe(
+  Shortcut.EXPAND_ALL_MESSAGES,
+  ShortcutSection.ACTIONS,
+  'Expand all messages',
+  'x'
+);
+describe(
+  Shortcut.COLLAPSE_ALL_MESSAGES,
+  ShortcutSection.ACTIONS,
+  'Collapse all messages',
+  'z'
+);
+describe(
+  Shortcut.REFRESH_CHANGE,
+  ShortcutSection.ACTIONS,
+  'Reload the change at the latest patch',
+  'shift+r:keyup'
+);
+describe(
+  Shortcut.TOGGLE_CHANGE_REVIEWED,
+  ShortcutSection.ACTIONS,
+  'Mark/unmark change as reviewed',
+  'r:keyup'
+);
+describe(
+  Shortcut.TOGGLE_FILE_REVIEWED,
+  ShortcutSection.ACTIONS,
+  'Toggle review flag on selected file',
+  'r:keyup'
+);
+describe(
+  Shortcut.REFRESH_CHANGE_LIST,
+  ShortcutSection.ACTIONS,
+  'Refresh list of changes',
+  'shift+r:keyup'
+);
+describe(
+  Shortcut.TOGGLE_CHANGE_STAR,
+  ShortcutSection.ACTIONS,
+  'Star/unstar change',
+  's:keydown'
+);
+describe(
+  Shortcut.OPEN_SUBMIT_DIALOG,
+  ShortcutSection.ACTIONS,
+  'Open submit dialog',
+  'shift+s'
+);
+describe(
+  Shortcut.TOGGLE_ATTENTION_SET,
+  ShortcutSection.ACTIONS,
+  'Toggle attention set status',
+  'shift+t'
+);
+describe(
+  Shortcut.EDIT_TOPIC,
+  ShortcutSection.ACTIONS,
+  'Add a change topic',
+  't'
+);
+describe(
+  Shortcut.DIFF_AGAINST_BASE,
+  ShortcutSection.DIFFS,
+  'Diff against base',
+  SPECIAL_SHORTCUT.V_KEY,
+  'down',
+  's'
+);
+describe(
+  Shortcut.DIFF_AGAINST_LATEST,
+  ShortcutSection.DIFFS,
+  'Diff against latest patchset',
+  SPECIAL_SHORTCUT.V_KEY,
+  'up',
+  'w'
+);
+describe(
+  Shortcut.DIFF_BASE_AGAINST_LEFT,
+  ShortcutSection.DIFFS,
+  'Diff base against left',
+  SPECIAL_SHORTCUT.V_KEY,
+  'left',
+  'a'
+);
+describe(
+  Shortcut.DIFF_RIGHT_AGAINST_LATEST,
+  ShortcutSection.DIFFS,
+  'Diff right against latest',
+  SPECIAL_SHORTCUT.V_KEY,
+  'right',
+  'd'
+);
+describe(
+  Shortcut.DIFF_BASE_AGAINST_LATEST,
+  ShortcutSection.DIFFS,
+  'Diff base against latest',
+  SPECIAL_SHORTCUT.V_KEY,
+  'b'
+);
+
+describe(
+  Shortcut.NEXT_LINE,
+  ShortcutSection.DIFFS,
+  'Go to next line',
+  'j',
+  'down'
+);
+describe(
+  Shortcut.PREV_LINE,
+  ShortcutSection.DIFFS,
+  'Go to previous line',
+  'k',
+  'up'
+);
+describe(
+  Shortcut.VISIBLE_LINE,
+  ShortcutSection.DIFFS,
+  'Move cursor to currently visible code',
+  '.'
+);
+describe(
+  Shortcut.NEXT_CHUNK,
+  ShortcutSection.DIFFS,
+  'Go to next diff chunk',
+  'n'
+);
+describe(
+  Shortcut.PREV_CHUNK,
+  ShortcutSection.DIFFS,
+  'Go to previous diff chunk',
+  'p'
+);
+describe(
+  Shortcut.TOGGLE_ALL_DIFF_CONTEXT,
+  ShortcutSection.DIFFS,
+  'Toggle all diff context',
+  'shift+x'
+);
+describe(
+  Shortcut.NEXT_COMMENT_THREAD,
+  ShortcutSection.DIFFS,
+  'Go to next comment thread',
+  'shift+n'
+);
+describe(
+  Shortcut.PREV_COMMENT_THREAD,
+  ShortcutSection.DIFFS,
+  'Go to previous comment thread',
+  'shift+p'
+);
+describe(
+  Shortcut.EXPAND_ALL_COMMENT_THREADS,
+  ShortcutSection.DIFFS,
+  'Expand all comment threads',
+  SPECIAL_SHORTCUT.DOC_ONLY,
+  'e'
+);
+describe(
+  Shortcut.COLLAPSE_ALL_COMMENT_THREADS,
+  ShortcutSection.DIFFS,
+  'Collapse all comment threads',
+  SPECIAL_SHORTCUT.DOC_ONLY,
+  'shift+e'
+);
+describe(
+  Shortcut.TOGGLE_HIDE_ALL_COMMENT_THREADS,
+  ShortcutSection.DIFFS,
+  'Hide/Display all comment threads',
+  'h'
+);
+describe(
+  Shortcut.LEFT_PANE,
+  ShortcutSection.DIFFS,
+  'Select left pane',
+  'shift+left'
+);
+describe(
+  Shortcut.RIGHT_PANE,
+  ShortcutSection.DIFFS,
+  'Select right pane',
+  'shift+right'
+);
+describe(
+  Shortcut.TOGGLE_LEFT_PANE,
+  ShortcutSection.DIFFS,
+  'Hide/show left diff',
+  'shift+a'
+);
+describe(Shortcut.NEW_COMMENT, ShortcutSection.DIFFS, 'Draft new comment', 'c');
+describe(
+  Shortcut.SAVE_COMMENT,
+  ShortcutSection.DIFFS,
+  'Save comment',
+  'ctrl+enter',
+  'meta+enter',
+  'ctrl+s',
+  'meta+s'
+);
+describe(
+  Shortcut.OPEN_DIFF_PREFS,
+  ShortcutSection.DIFFS,
+  'Show diff preferences',
+  ','
+);
+describe(
+  Shortcut.TOGGLE_DIFF_REVIEWED,
+  ShortcutSection.DIFFS,
+  'Mark/unmark file as reviewed',
+  'r:keyup'
+);
+describe(
+  Shortcut.TOGGLE_DIFF_MODE,
+  ShortcutSection.DIFFS,
+  'Toggle unified/side-by-side diff',
+  'm:keyup'
+);
+describe(
+  Shortcut.NEXT_UNREVIEWED_FILE,
+  ShortcutSection.DIFFS,
+  'Mark file as reviewed and go to next unreviewed file',
+  'shift+m'
+);
+describe(
+  Shortcut.TOGGLE_BLAME,
+  ShortcutSection.DIFFS,
+  'Toggle blame',
+  'b:keyup'
+);
+describe(Shortcut.OPEN_FILE_LIST, ShortcutSection.DIFFS, 'Open file list', 'f');
+describe(
+  Shortcut.NEXT_FILE,
+  ShortcutSection.NAVIGATION,
+  'Go to next file',
+  ']'
+);
+describe(
+  Shortcut.PREV_FILE,
+  ShortcutSection.NAVIGATION,
+  'Go to previous file',
+  '['
+);
+describe(
+  Shortcut.NEXT_FILE_WITH_COMMENTS,
+  ShortcutSection.NAVIGATION,
+  'Go to next file that has comments',
+  'shift+j'
+);
+describe(
+  Shortcut.PREV_FILE_WITH_COMMENTS,
+  ShortcutSection.NAVIGATION,
+  'Go to previous file that has comments',
+  'shift+k'
+);
+describe(
+  Shortcut.OPEN_FIRST_FILE,
+  ShortcutSection.NAVIGATION,
+  'Go to first file',
+  ']'
+);
+describe(
+  Shortcut.OPEN_LAST_FILE,
+  ShortcutSection.NAVIGATION,
+  'Go to last file',
+  '['
+);
+describe(
+  Shortcut.UP_TO_DASHBOARD,
+  ShortcutSection.NAVIGATION,
+  'Up to dashboard',
+  'u'
+);
+describe(
+  Shortcut.UP_TO_CHANGE,
+  ShortcutSection.NAVIGATION,
+  'Up to change',
+  'u'
+);
+
+describe(
+  Shortcut.CURSOR_NEXT_FILE,
+  ShortcutSection.FILE_LIST,
+  'Select next file',
+  'j',
+  'down'
+);
+describe(
+  Shortcut.CURSOR_PREV_FILE,
+  ShortcutSection.FILE_LIST,
+  'Select previous file',
+  'k',
+  'up'
+);
+describe(
+  Shortcut.OPEN_FILE,
+  ShortcutSection.FILE_LIST,
+  'Go to selected file',
+  'o',
+  'enter'
+);
+describe(
+  Shortcut.TOGGLE_ALL_INLINE_DIFFS,
+  ShortcutSection.FILE_LIST,
+  'Show/hide all inline diffs',
+  'shift+i'
+);
+describe(
+  Shortcut.TOGGLE_INLINE_DIFF,
+  ShortcutSection.FILE_LIST,
+  'Show/hide selected inline diff',
+  'i'
+);
+
+describe(
+  Shortcut.SEND_REPLY,
+  ShortcutSection.REPLY_DIALOG,
+  'Send reply',
+  SPECIAL_SHORTCUT.DOC_ONLY,
+  'ctrl+enter',
+  'meta+enter'
+);
+describe(
+  Shortcut.EMOJI_DROPDOWN,
+  ShortcutSection.REPLY_DIALOG,
+  'Emoji dropdown',
+  SPECIAL_SHORTCUT.DOC_ONLY,
+  ':'
+);
diff --git a/polygerrit-ui/app/services/shortcuts/shortcuts-service.ts b/polygerrit-ui/app/services/shortcuts/shortcuts-service.ts
new file mode 100644
index 0000000..d0e2d49
--- /dev/null
+++ b/polygerrit-ui/app/services/shortcuts/shortcuts-service.ts
@@ -0,0 +1,317 @@
+/**
+ * @license
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import {
+  config,
+  Shortcut,
+  ShortcutHelpItem,
+  ShortcutSection,
+  SPECIAL_SHORTCUT,
+} from './shortcuts-config';
+import {disableShortcuts$} from '../user/user-model';
+import {IronKeyboardEvent, isIronKeyboardEvent} from '../../types/events';
+import {isElementTarget} from '../../utils/dom-util';
+import {ReportingService} from '../gr-reporting/gr-reporting';
+
+export type SectionView = Array<{binding: string[][]; text: string}>;
+
+/**
+ * The interface for listener for shortcut events.
+ */
+export type ShortcutListener = (
+  viewMap?: Map<ShortcutSection, SectionView>
+) => void;
+
+const COMBO_KEYS = ['g', 'v'];
+
+/**
+ * Shortcuts service, holds all hosts, bindings and listeners.
+ */
+export class ShortcutsService {
+  /**
+   * Keeps track of the components that are currently active such that we can
+   * show a shortcut help dialog that only shows the shortcuts that are
+   * currently relevant.
+   */
+  private readonly activeHosts = new Map<unknown, Map<string, string>>();
+
+  /** Static map built in the constructor by iterating over the config. */
+  private readonly bindings = new Map<Shortcut, string[]>();
+
+  private readonly listeners = new Set<ShortcutListener>();
+
+  /**
+   * Maps keys (e.g. 'g') to the timestamp when they have last been pressed.
+   * This enabled key combinations like 'g+o' where we can check whether 'g' was
+   * pressed recently when 'o' is processed. Keys of this map must be items of
+   * COMBO_KEYS. Values are Date timestamps in milliseconds.
+   */
+  private readonly keyLastPressed = new Map<string, number>();
+
+  /** Keeps track of the corresponding user preference. */
+  private shortcutsDisabled = false;
+
+  constructor(readonly reporting?: ReportingService) {
+    for (const section of config.keys()) {
+      const items = config.get(section) ?? [];
+      for (const item of items) {
+        this.bindings.set(item.shortcut, item.bindings);
+      }
+    }
+    disableShortcuts$.subscribe(x => (this.shortcutsDisabled = x));
+    document.addEventListener('keydown', (e: KeyboardEvent) => {
+      if (!COMBO_KEYS.includes(e.key)) return;
+      if (this.shouldSuppress(e)) return;
+      this.keyLastPressed.set(e.key, Date.now());
+    });
+  }
+
+  public _testOnly_isEmpty() {
+    return this.activeHosts.size === 0 && this.listeners.size === 0;
+  }
+
+  shouldSuppress(event: IronKeyboardEvent | KeyboardEvent) {
+    if (this.shortcutsDisabled) return true;
+    const e = isIronKeyboardEvent(event) ? event.detail.keyboardEvent : event;
+
+    // Note that when you listen on document, then `e.currentTarget` will be the
+    // document and `e.target` will be `<gr-app>` due to shadow dom, but by
+    // using the composedPath() you can actually find the true origin of the
+    // event.
+    const rootTarget = e.composedPath()[0];
+    if (!isElementTarget(rootTarget)) return false;
+    const tagName = rootTarget.tagName;
+    const type = rootTarget.getAttribute('type');
+
+    if (
+      // Suppress shortcuts on <input> and <textarea>, but not on
+      // checkboxes, because we want to enable workflows like 'click
+      // mark-reviewed and then press ] to go to the next file'.
+      (tagName === 'INPUT' && type !== 'checkbox') ||
+      tagName === 'TEXTAREA' ||
+      // Suppress shortcuts if the key is 'enter'
+      // and target is an anchor or button or paper-tab.
+      (e.keyCode === 13 &&
+        (tagName === 'A' || tagName === 'BUTTON' || tagName === 'PAPER-TAB'))
+    ) {
+      return true;
+    }
+    const path: EventTarget[] = e.composedPath() ?? [];
+    for (const el of path) {
+      if (!isElementTarget(el)) continue;
+      if (el.tagName === 'GR-OVERLAY') return true;
+    }
+    // eg: {key: "k:keydown", ..., from: "gr-diff-view"}
+    let key = `${e.key}:${e.type}`;
+    // TODO(brohlfs): Re-enable reporting of g- and v-keys.
+    // if (this._inGoKeyMode()) key = 'g+' + key;
+    // if (this.inVKeyMode()) key = 'v+' + key;
+    if (e.shiftKey) key = 'shift+' + key;
+    if (e.ctrlKey) key = 'ctrl+' + key;
+    if (e.metaKey) key = 'meta+' + key;
+    if (e.altKey) key = 'alt+' + key;
+    let from = 'unknown';
+    if (isElementTarget(e.currentTarget)) {
+      from = e.currentTarget.tagName;
+    }
+    this.reporting?.reportInteraction('shortcut-triggered', {key, from});
+    return false;
+  }
+
+  createTitle(shortcutName: Shortcut, section: ShortcutSection) {
+    const desc = this.getDescription(section, shortcutName);
+    const shortcut = this.getShortcut(shortcutName);
+    return desc && shortcut ? `${desc} (shortcut: ${shortcut})` : '';
+  }
+
+  getBindingsForShortcut(shortcut: Shortcut) {
+    return this.bindings.get(shortcut);
+  }
+
+  attachHost(host: unknown, shortcuts: Map<string, string>) {
+    this.activeHosts.set(host, shortcuts);
+    this.notifyListeners();
+  }
+
+  detachHost(host: unknown) {
+    if (!this.activeHosts.delete(host)) return false;
+    this.notifyListeners();
+    return true;
+  }
+
+  addListener(listener: ShortcutListener) {
+    this.listeners.add(listener);
+    listener(this.directoryView());
+  }
+
+  removeListener(listener: ShortcutListener) {
+    return this.listeners.delete(listener);
+  }
+
+  getDescription(section: ShortcutSection, shortcutName: Shortcut) {
+    const bindings = config.get(section);
+    if (!bindings) return '';
+    const binding = bindings.find(binding => binding.shortcut === shortcutName);
+    return binding?.text ?? '';
+  }
+
+  getShortcut(shortcutName: Shortcut) {
+    const bindings = this.bindings.get(shortcutName);
+    if (!bindings) return '';
+    return bindings
+      .map(binding => this.describeBinding(binding).join('+'))
+      .join(',');
+  }
+
+  activeShortcutsBySection() {
+    const activeShortcuts = new Set<string>();
+    this.activeHosts.forEach(shortcuts => {
+      shortcuts.forEach((_, shortcut) => activeShortcuts.add(shortcut));
+    });
+
+    const activeShortcutsBySection = new Map<
+      ShortcutSection,
+      ShortcutHelpItem[]
+    >();
+    config.forEach((shortcutList, section) => {
+      shortcutList.forEach(shortcutHelp => {
+        if (activeShortcuts.has(shortcutHelp.shortcut)) {
+          if (!activeShortcutsBySection.has(section)) {
+            activeShortcutsBySection.set(section, []);
+          }
+          // From previous condition, the `get(section)`
+          // should always return a valid result
+          activeShortcutsBySection.get(section)!.push(shortcutHelp);
+        }
+      });
+    });
+    return activeShortcutsBySection;
+  }
+
+  directoryView() {
+    const view = new Map<ShortcutSection, SectionView>();
+    this.activeShortcutsBySection().forEach((shortcutHelps, section) => {
+      const sectionView: SectionView = [];
+      shortcutHelps.forEach(shortcutHelp => {
+        const bindingDesc = this.describeBindings(shortcutHelp.shortcut);
+        if (!bindingDesc) {
+          return;
+        }
+        this.distributeBindingDesc(bindingDesc).forEach(bindingDesc => {
+          sectionView.push({
+            binding: bindingDesc,
+            text: shortcutHelp.text,
+          });
+        });
+      });
+      view.set(section, sectionView);
+    });
+    return view;
+  }
+
+  distributeBindingDesc(bindingDesc: string[][]): string[][][] {
+    if (
+      bindingDesc.length === 1 ||
+      this.comboSetDisplayWidth(bindingDesc) < 21
+    ) {
+      return [bindingDesc];
+    }
+    // Find the largest prefix of bindings that is under the
+    // size threshold.
+    const head = [bindingDesc[0]];
+    for (let i = 1; i < bindingDesc.length; i++) {
+      head.push(bindingDesc[i]);
+      if (this.comboSetDisplayWidth(head) >= 21) {
+        head.pop();
+        return [head].concat(this.distributeBindingDesc(bindingDesc.slice(i)));
+      }
+    }
+    return [];
+  }
+
+  comboSetDisplayWidth(bindingDesc: string[][]) {
+    const bindingSizer = (binding: string[]) =>
+      binding.reduce((acc, key) => acc + key.length, 0);
+    // Width is the sum of strings + (n-1) * 2 to account for the word
+    // "or" joining them.
+    return (
+      bindingDesc.reduce((acc, binding) => acc + bindingSizer(binding), 0) +
+      2 * (bindingDesc.length - 1)
+    );
+  }
+
+  describeBindings(shortcut: Shortcut): string[][] | null {
+    const bindings = this.bindings.get(shortcut);
+    if (!bindings) {
+      return null;
+    }
+    if (bindings[0] === SPECIAL_SHORTCUT.GO_KEY) {
+      return bindings
+        .slice(1)
+        .map(binding => this._describeKey(binding))
+        .map(binding => ['g'].concat(binding));
+    }
+    if (bindings[0] === SPECIAL_SHORTCUT.V_KEY) {
+      return bindings
+        .slice(1)
+        .map(binding => this._describeKey(binding))
+        .map(binding => ['v'].concat(binding));
+    }
+
+    return bindings
+      .filter(binding => binding !== SPECIAL_SHORTCUT.DOC_ONLY)
+      .map(binding => this.describeBinding(binding));
+  }
+
+  _describeKey(key: string) {
+    switch (key) {
+      case 'shift':
+        return 'Shift';
+      case 'meta':
+        return 'Meta';
+      case 'ctrl':
+        return 'Ctrl';
+      case 'enter':
+        return 'Enter';
+      case 'up':
+        return '\u2191'; // ↑
+      case 'down':
+        return '\u2193'; // ↓
+      case 'left':
+        return '\u2190'; // ←
+      case 'right':
+        return '\u2192'; // →
+      default:
+        return key;
+    }
+  }
+
+  describeBinding(binding: string) {
+    // single key bindings
+    if (binding.length === 1) {
+      return [binding];
+    }
+    return binding
+      .split(':')[0]
+      .split('+')
+      .map(part => this._describeKey(part));
+  }
+
+  notifyListeners() {
+    const view = this.directoryView();
+    this.listeners.forEach(listener => listener(view));
+  }
+}
diff --git a/polygerrit-ui/app/services/shortcuts/shortcuts-service_test.ts b/polygerrit-ui/app/services/shortcuts/shortcuts-service_test.ts
new file mode 100644
index 0000000..0998a4c
--- /dev/null
+++ b/polygerrit-ui/app/services/shortcuts/shortcuts-service_test.ts
@@ -0,0 +1,293 @@
+/**
+ * @license
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import '../../test/common-test-setup-karma';
+import {ShortcutsService} from '../../services/shortcuts/shortcuts-service';
+import {Shortcut, ShortcutSection} from './shortcuts-config';
+import * as MockInteractions from '@polymer/iron-test-helpers/mock-interactions';
+
+async function keyEventOn(
+  el: HTMLElement,
+  callback: (e: KeyboardEvent) => void,
+  keyCode = 75,
+  key = 'k'
+): Promise<KeyboardEvent> {
+  let resolve: (e: KeyboardEvent) => void;
+  const promise = new Promise<KeyboardEvent>(r => (resolve = r));
+  el.addEventListener('keydown', (e: KeyboardEvent) => {
+    callback(e);
+    resolve(e);
+  });
+  MockInteractions.keyDownOn(el, keyCode, null, key);
+  return await promise;
+}
+
+suite('shortcuts-service tests', () => {
+  let service: ShortcutsService;
+
+  setup(() => {
+    service = new ShortcutsService();
+  });
+
+  suite('shouldSuppress', () => {
+    test('do not suppress shortcut event from <div>', async () => {
+      await keyEventOn(document.createElement('div'), e => {
+        assert.isFalse(service.shouldSuppress(e));
+      });
+    });
+
+    test('suppress shortcut event from <input>', async () => {
+      await keyEventOn(document.createElement('input'), e => {
+        assert.isTrue(service.shouldSuppress(e));
+      });
+    });
+
+    test('suppress shortcut event from <textarea>', async () => {
+      await keyEventOn(document.createElement('textarea'), e => {
+        assert.isTrue(service.shouldSuppress(e));
+      });
+    });
+
+    test('do not suppress shortcut event from checkbox <input>', async () => {
+      const inputEl = document.createElement('input');
+      inputEl.setAttribute('type', 'checkbox');
+      await keyEventOn(inputEl, e => {
+        assert.isFalse(service.shouldSuppress(e));
+      });
+    });
+
+    test('suppress shortcut event from children of <gr-overlay>', async () => {
+      const overlay = document.createElement('gr-overlay');
+      const div = document.createElement('div');
+      overlay.appendChild(div);
+      await keyEventOn(div, e => {
+        assert.isTrue(service.shouldSuppress(e));
+      });
+    });
+
+    test('suppress "enter" shortcut event from <a>', async () => {
+      await keyEventOn(document.createElement('a'), e => {
+        assert.isFalse(service.shouldSuppress(e));
+      });
+      await keyEventOn(
+        document.createElement('a'),
+        e => assert.isTrue(service.shouldSuppress(e)),
+        13,
+        'enter'
+      );
+    });
+  });
+
+  test('getShortcut', () => {
+    const NEXT_FILE = Shortcut.NEXT_FILE;
+    assert.equal(service.getShortcut(NEXT_FILE), ']');
+  });
+
+  test('getShortcut with modifiers', () => {
+    const NEXT_FILE = Shortcut.TOGGLE_LEFT_PANE;
+    assert.equal(service.getShortcut(NEXT_FILE), 'Shift+a');
+  });
+
+  suite('binding descriptions', () => {
+    function mapToObject<K, V>(m: Map<K, V>) {
+      const o: any = {};
+      m.forEach((v: V, k: K) => (o[k] = v));
+      return o;
+    }
+
+    test('single combo description', () => {
+      assert.deepEqual(service.describeBinding('a'), ['a']);
+      assert.deepEqual(service.describeBinding('a:keyup'), ['a']);
+      assert.deepEqual(service.describeBinding('ctrl+a'), ['Ctrl', 'a']);
+      assert.deepEqual(service.describeBinding('ctrl+shift+up:keyup'), [
+        'Ctrl',
+        'Shift',
+        '↑',
+      ]);
+    });
+
+    test('combo set description', () => {
+      assert.deepEqual(
+        service.describeBindings(Shortcut.GO_TO_OPENED_CHANGES),
+        [['g', 'o']]
+      );
+      assert.deepEqual(service.describeBindings(Shortcut.SAVE_COMMENT), [
+        ['Ctrl', 'Enter'],
+        ['Meta', 'Enter'],
+        ['Ctrl', 's'],
+        ['Meta', 's'],
+      ]);
+      assert.deepEqual(service.describeBindings(Shortcut.PREV_FILE), [['[']]);
+    });
+
+    test('combo set description width', () => {
+      assert.strictEqual(service.comboSetDisplayWidth([['u']]), 1);
+      assert.strictEqual(service.comboSetDisplayWidth([['g', 'o']]), 2);
+      assert.strictEqual(service.comboSetDisplayWidth([['Shift', 'r']]), 6);
+      assert.strictEqual(service.comboSetDisplayWidth([['x'], ['y']]), 4);
+      assert.strictEqual(
+        service.comboSetDisplayWidth([['x'], ['y'], ['Shift', 'z']]),
+        12
+      );
+    });
+
+    test('distribute shortcut help', () => {
+      assert.deepEqual(service.distributeBindingDesc([['o']]), [[['o']]]);
+      assert.deepEqual(service.distributeBindingDesc([['g', 'o']]), [
+        [['g', 'o']],
+      ]);
+      assert.deepEqual(
+        service.distributeBindingDesc([['ctrl', 'shift', 'meta', 'enter']]),
+        [[['ctrl', 'shift', 'meta', 'enter']]]
+      );
+      assert.deepEqual(
+        service.distributeBindingDesc([
+          ['ctrl', 'shift', 'meta', 'enter'],
+          ['o'],
+        ]),
+        [[['ctrl', 'shift', 'meta', 'enter']], [['o']]]
+      );
+      assert.deepEqual(
+        service.distributeBindingDesc([
+          ['ctrl', 'enter'],
+          ['meta', 'enter'],
+          ['ctrl', 's'],
+          ['meta', 's'],
+        ]),
+        [
+          [
+            ['ctrl', 'enter'],
+            ['meta', 'enter'],
+          ],
+          [
+            ['ctrl', 's'],
+            ['meta', 's'],
+          ],
+        ]
+      );
+    });
+
+    test('active shortcuts by section', () => {
+      assert.deepEqual(mapToObject(service.activeShortcutsBySection()), {});
+
+      service.attachHost({}, new Map([[Shortcut.NEXT_FILE, 'null']]));
+      assert.deepEqual(mapToObject(service.activeShortcutsBySection()), {
+        [ShortcutSection.NAVIGATION]: [
+          {
+            shortcut: Shortcut.NEXT_FILE,
+            text: 'Go to next file',
+            bindings: [']'],
+          },
+        ],
+      });
+
+      service.attachHost({}, new Map([[Shortcut.NEXT_LINE, 'null']]));
+      assert.deepEqual(mapToObject(service.activeShortcutsBySection()), {
+        [ShortcutSection.DIFFS]: [
+          {
+            shortcut: Shortcut.NEXT_LINE,
+            text: 'Go to next line',
+            bindings: ['j', 'down'],
+          },
+        ],
+        [ShortcutSection.NAVIGATION]: [
+          {
+            shortcut: Shortcut.NEXT_FILE,
+            text: 'Go to next file',
+            bindings: [']'],
+          },
+        ],
+      });
+
+      service.attachHost(
+        {},
+        new Map([
+          [Shortcut.SEARCH, 'null'],
+          [Shortcut.GO_TO_OPENED_CHANGES, 'null'],
+        ])
+      );
+      assert.deepEqual(mapToObject(service.activeShortcutsBySection()), {
+        [ShortcutSection.DIFFS]: [
+          {
+            shortcut: Shortcut.NEXT_LINE,
+            text: 'Go to next line',
+            bindings: ['j', 'down'],
+          },
+        ],
+        [ShortcutSection.EVERYWHERE]: [
+          {
+            shortcut: Shortcut.SEARCH,
+            text: 'Search',
+            bindings: ['/'],
+          },
+          {
+            shortcut: Shortcut.GO_TO_OPENED_CHANGES,
+            text: 'Go to Opened Changes',
+            bindings: ['GO_KEY', 'o'],
+          },
+        ],
+        [ShortcutSection.NAVIGATION]: [
+          {
+            shortcut: Shortcut.NEXT_FILE,
+            text: 'Go to next file',
+            bindings: [']'],
+          },
+        ],
+      });
+    });
+
+    test('directory view', () => {
+      assert.deepEqual(mapToObject(service.directoryView()), {});
+
+      service.attachHost(
+        {},
+        new Map([
+          [Shortcut.GO_TO_OPENED_CHANGES, 'null'],
+          [Shortcut.NEXT_FILE, 'null'],
+          [Shortcut.NEXT_LINE, 'null'],
+          [Shortcut.SAVE_COMMENT, 'null'],
+          [Shortcut.SEARCH, 'null'],
+        ])
+      );
+      assert.deepEqual(mapToObject(service.directoryView()), {
+        [ShortcutSection.DIFFS]: [
+          {binding: [['j'], ['↓']], text: 'Go to next line'},
+          {
+            binding: [
+              ['Ctrl', 'Enter'],
+              ['Meta', 'Enter'],
+            ],
+            text: 'Save comment',
+          },
+          {
+            binding: [
+              ['Ctrl', 's'],
+              ['Meta', 's'],
+            ],
+            text: 'Save comment',
+          },
+        ],
+        [ShortcutSection.EVERYWHERE]: [
+          {binding: [['/']], text: 'Search'},
+          {binding: [['g', 'o']], text: 'Go to Opened Changes'},
+        ],
+        [ShortcutSection.NAVIGATION]: [
+          {binding: [[']']], text: 'Go to next file'},
+        ],
+      });
+    });
+  });
+});
diff --git a/polygerrit-ui/app/services/user/user-model.ts b/polygerrit-ui/app/services/user/user-model.ts
index 4115a71..72ce3e1 100644
--- a/polygerrit-ui/app/services/user/user-model.ts
+++ b/polygerrit-ui/app/services/user/user-model.ts
@@ -60,3 +60,8 @@
   map(preferences => preferences?.my ?? []),
   distinctUntilChanged()
 );
+
+export const disableShortcuts$ = preferences$.pipe(
+  map(preferences => preferences?.disable_keyboard_shortcuts ?? false),
+  distinctUntilChanged()
+);
diff --git a/polygerrit-ui/app/styles/themes/app-theme.ts b/polygerrit-ui/app/styles/themes/app-theme.ts
index f1711ac..a0e85b1 100644
--- a/polygerrit-ui/app/styles/themes/app-theme.ts
+++ b/polygerrit-ui/app/styles/themes/app-theme.ts
@@ -284,7 +284,7 @@
     --font-weight-bold: 500;
     --font-weight-h1: 400;
     --font-weight-h2: 400;
-    --font-weight-h3: 400;
+    --font-weight-h3: var(--font-weight-bold, 500);
     --context-control-button-font: var(--font-weight-normal) var(--font-size-normal) var(--font-family);
     --code-hint-font-weight: 500;
     --image-diff-button-font: var(--font-weight-normal) var(--font-size-normal) var(--font-family);
diff --git a/polygerrit-ui/app/test/common-test-setup.ts b/polygerrit-ui/app/test/common-test-setup.ts
index 550d3df..949c268 100644
--- a/polygerrit-ui/app/test/common-test-setup.ts
+++ b/polygerrit-ui/app/test/common-test-setup.ts
@@ -30,9 +30,7 @@
   registerTestCleanup,
   addIronOverlayBackdropStyleEl,
   removeIronOverlayBackdropStyleEl,
-  TestKeyboardShortcutBinder,
 } from './test-utils';
-import {_testOnly_getShortcutManagerInstance} from '../mixins/keyboard-shortcut-mixin/keyboard-shortcut-mixin';
 import {safeTypesBridge} from '../utils/safe-types-util';
 import {_testOnly_initGerritPluginApi} from '../elements/shared/gr-js-api-interface/gr-gerrit';
 import {initGlobalVariables} from '../elements/gr-app-global-var-init';
@@ -45,6 +43,7 @@
 import {cleanUpStorage} from '../services/storage/gr-storage_mock';
 import {updatePreferences} from '../services/user/user-model';
 import {createDefaultPreferences} from '../constants/constants';
+import {appContext} from '../services/app-context';
 
 declare global {
   interface Window {
@@ -101,14 +100,13 @@
   // If the following asserts fails - then window.stub is
   // overwritten by some other code.
   assert.equal(getCleanupsCount(), 0);
+  _testOnlyInitAppContext();
   // The following calls is nessecary to avoid influence of previously executed
   // tests.
-  TestKeyboardShortcutBinder.push();
-  _testOnlyInitAppContext();
   initGlobalVariables();
   _testOnly_initGerritPluginApi();
-  const mgr = _testOnly_getShortcutManagerInstance();
-  assert.isTrue(mgr._testOnly_isEmpty());
+  const shortcuts = appContext.shortcutsService;
+  assert.isTrue(shortcuts._testOnly_isEmpty());
   const selection = document.getSelection();
   if (selection) {
     selection.removeAllRanges();
@@ -197,7 +195,6 @@
 teardown(() => {
   sinon.restore();
   cleanupTestUtils();
-  TestKeyboardShortcutBinder.pop();
   checkGlobalSpace();
   removeIronOverlayBackdropStyleEl();
   cancelAllTasks();
diff --git a/polygerrit-ui/app/test/test-utils.ts b/polygerrit-ui/app/test/test-utils.ts
index a60c1d1..1cde372 100644
--- a/polygerrit-ui/app/test/test-utils.ts
+++ b/polygerrit-ui/app/test/test-utils.ts
@@ -17,10 +17,6 @@
 import '../types/globals';
 import {_testOnly_resetPluginLoader} from '../elements/shared/gr-js-api-interface/gr-plugin-loader';
 import {_testOnly_resetEndpoints} from '../elements/shared/gr-js-api-interface/gr-plugin-endpoints';
-import {
-  _testOnly_getShortcutManagerInstance,
-  Shortcut,
-} from '../mixins/keyboard-shortcut-mixin/keyboard-shortcut-mixin';
 import {appContext} from '../services/app-context';
 import {RestApiService} from '../services/gr-rest-api/gr-rest-api';
 import {SinonSpy} from 'sinon';
@@ -53,44 +49,6 @@
   return getComputedStyle(el).getPropertyValue('display') !== 'none';
 }
 
-// Some tests/elements can define its own binding. We want to restore bindings
-// at the end of the test. The TestKeyboardShortcutBinder store bindings in
-// stack, so it is possible to override bindings in nested suites.
-export class TestKeyboardShortcutBinder {
-  private static stack: TestKeyboardShortcutBinder[] = [];
-
-  static push() {
-    const testBinder = new TestKeyboardShortcutBinder();
-    this.stack.push(testBinder);
-    return _testOnly_getShortcutManagerInstance();
-  }
-
-  static pop() {
-    const item = this.stack.pop();
-    if (!item) {
-      throw new Error('stack is empty');
-    }
-    item._restoreShortcuts();
-  }
-
-  private readonly originalBinding: Map<Shortcut, string[]>;
-
-  constructor() {
-    this.originalBinding = new Map(
-      _testOnly_getShortcutManagerInstance()._testOnly_getBindings()
-    );
-  }
-
-  _restoreShortcuts() {
-    const bindings =
-      _testOnly_getShortcutManagerInstance()._testOnly_getBindings();
-    bindings.clear();
-    this.originalBinding.forEach((value, key) => {
-      bindings.set(key, value);
-    });
-  }
-}
-
 // Provide reset plugins function to clear installed plugins between tests.
 // No gr-app found (running tests)
 export const resetPlugins = () => {
diff --git a/polygerrit-ui/app/tsconfig.json b/polygerrit-ui/app/tsconfig.json
index 7b01226..5040496 100644
--- a/polygerrit-ui/app/tsconfig.json
+++ b/polygerrit-ui/app/tsconfig.json
@@ -46,6 +46,31 @@
     "typeRoots": [
       "node_modules/@types",
       "../node_modules/@types"
+    ],
+
+    "plugins": [
+      {
+        "name": "ts-lit-plugin",
+        "strict": true,
+        "rules": {
+          "no-unknown-tag-name": "error",
+          "no-unclosed-tag": "error",
+          "no-unknown-property": "error",
+          "no-unintended-mixed-binding": "error",
+          "no-invalid-boolean-binding": "error",
+          "no-expressionless-property-binding": "error",
+          "no-noncallable-event-binding": "error",
+          "no-boolean-in-attribute-binding": "error",
+          "no-complex-attribute-binding": "error",
+          "no-nullable-attribute-binding": "error",
+          "no-incompatible-type-binding": "error",
+          "no-invalid-directive-binding": "error",
+          "no-incompatible-property-type": "error",
+          "no-unknown-property-converter": "error",
+          "no-invalid-attribute-name": "error",
+          "no-invalid-tag-name": "error"
+        }
+      }
     ]
   },
   // With the * pattern (without an extension), only supported files
diff --git a/polygerrit-ui/app/types/events.ts b/polygerrit-ui/app/types/events.ts
index 0069321..c78f61a 100644
--- a/polygerrit-ui/app/types/events.ts
+++ b/polygerrit-ui/app/types/events.ts
@@ -14,7 +14,6 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-import {EventApi} from '@polymer/polymer/lib/legacy/polymer.dom';
 import {PatchSetNum} from './common';
 import {UIComment} from '../utils/comment-util';
 import {FetchRequest} from './types';
@@ -69,10 +68,6 @@
     'editable-content-save': EditableContentSaveEvent;
     'location-change': LocationChangeEvent;
     'iron-announce': IronAnnounceEvent;
-    /* prettier-ignore */
-    'keydown': KeydownEvent;
-    /* prettier-ignore */
-    'keypress': KeypressEvent;
     'line-mouse-enter': LineNumberEvent;
     'line-mouse-leave': LineNumberEvent;
     'line-cursor-moved-in': LineNumberEvent;
@@ -148,10 +143,6 @@
 }
 export type IronAnnounceEvent = CustomEvent<IronAnnounceEventDetail>;
 
-export type KeydownEvent = CustomKeyboardEvent;
-
-export type KeypressEvent = InputEvent;
-
 export interface LocationChangeEventDetail {
   hash: string;
   pathname: string;
@@ -252,20 +243,28 @@
 export type TitleChangeEvent = CustomEvent<TitleChangeEventDetail>;
 
 /**
- * Keyboard events emitted from polymer elements.
+ * Keyboard events emitted from elements using IronA11yKeysBehavior: That means
+ * that the element returns a list of handlers from either `keyBindings()` or
+ * from `keyboardShortcuts()`. This event should not be used in Lit elements
+ * and will be obsolete once the Lit migration is completed.
  */
-export interface CustomKeyboardEvent extends CustomEvent, EventApi {
-  event: CustomKeyboardEvent;
-  detail: {
-    keyboardEvent?: CustomKeyboardEvent;
-    // TODO(TS): maybe should mark as optional and check before accessing
-    key: string;
-  };
-  readonly altKey: boolean;
-  readonly changedTouches: TouchList;
-  readonly ctrlKey: boolean;
-  readonly metaKey: boolean;
-  readonly shiftKey: boolean;
-  readonly keyCode: number;
-  readonly repeat: boolean;
+export interface IronKeyboardEvent extends CustomEvent {
+  detail: IronKeyboardEventDetail;
+}
+
+export interface IronKeyboardEventDetail {
+  keyboardEvent: KeyboardEvent;
+  key: string;
+  combo?: string;
+}
+
+export function isIronKeyboardEvent(
+  e: IronKeyboardEvent | Event | CustomEvent
+): e is IronKeyboardEvent {
+  const ike = e as IronKeyboardEvent;
+  return !!ike?.detail?.keyboardEvent;
+}
+
+export interface IronKeyboardEventListener {
+  (evt: IronKeyboardEvent): void;
 }
diff --git a/polygerrit-ui/app/utils/access-util.ts b/polygerrit-ui/app/utils/access-util.ts
index 44830e2..165eacf 100644
--- a/polygerrit-ui/app/utils/access-util.ts
+++ b/polygerrit-ui/app/utils/access-util.ts
@@ -14,7 +14,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-import {LabelName} from '../types/common';
+import {GitRef, LabelName} from '../types/common';
 
 export enum AccessPermissionId {
   ABANDON = 'abandon',
@@ -156,7 +156,7 @@
 }
 
 export interface PermissionArrayItem<T> {
-  id: string;
+  id: GitRef;
   value: T;
 }
 
@@ -175,7 +175,7 @@
   return Object.keys(obj)
     .map(key => {
       return {
-        id: key,
+        id: key as GitRef,
         value: obj[key],
       };
     })
diff --git a/polygerrit-ui/app/utils/async-util.ts b/polygerrit-ui/app/utils/async-util.ts
index c82f5e4..90ee5a5 100644
--- a/polygerrit-ui/app/utils/async-util.ts
+++ b/polygerrit-ui/app/utils/async-util.ts
@@ -117,9 +117,9 @@
  * Ensure only one call is made within THROTTLE_INTERVAL_MS and any call within
  * this interval is ignored
  */
-export function throttleWrap(fn: (e: Event) => void) {
+export function throttleWrap<T>(fn: (e: T) => void) {
   let lastCall: number | undefined;
-  return (e: Event) => {
+  return (e: T) => {
     if (
       lastCall !== undefined &&
       Date.now() - lastCall < THROTTLE_INTERVAL_MS
diff --git a/polygerrit-ui/app/utils/common-util.ts b/polygerrit-ui/app/utils/common-util.ts
index 0002254..9e3bc74 100644
--- a/polygerrit-ui/app/utils/common-util.ts
+++ b/polygerrit-ui/app/utils/common-util.ts
@@ -104,8 +104,11 @@
   selector: string
 ): E | undefined {
   if (!el) return undefined;
-  const root = el.shadowRoot ?? el;
-  return root.querySelector<E>(selector) ?? undefined;
+  if (el.shadowRoot) {
+    const r = el.shadowRoot.querySelector<E>(selector);
+    if (r) return r;
+  }
+  return el.querySelector<E>(selector) ?? undefined;
 }
 
 export function queryAndAssert<E extends Element = Element>(
diff --git a/polygerrit-ui/app/utils/dom-util.ts b/polygerrit-ui/app/utils/dom-util.ts
index 7b1f3e3..ead47bb 100644
--- a/polygerrit-ui/app/utils/dom-util.ts
+++ b/polygerrit-ui/app/utils/dom-util.ts
@@ -14,10 +14,9 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
-import {dom, EventApi} from '@polymer/polymer/lib/legacy/polymer.dom';
+import {EventApi} from '@polymer/polymer/lib/legacy/polymer.dom';
 import {check} from './common-util';
-import {CustomKeyboardEvent} from '../types/events';
+import {IronKeyboardEvent} from '../types/events';
 
 /**
  * Event emitted from polymer elements.
@@ -37,6 +36,17 @@
   return 'shadowRoot' in el;
 }
 
+export function isElement(node: Node): node is Element {
+  return node.nodeType === 1;
+}
+
+export function isElementTarget(
+  target: EventTarget | null | undefined
+): target is Element {
+  if (!target) return false;
+  return 'nodeType' in target && isElement(target as Node);
+}
+
 // TODO: maybe should have a better name for this
 function getPathFromNode(el: EventTarget) {
   let tagName = '';
@@ -298,23 +308,14 @@
   return e.altKey || e.ctrlKey || e.metaKey || e.shiftKey;
 }
 
-// Deprecated. Try using "normal" KeyboardEvent and modifierPressed() above.
-export function isModifierPressed(event: CustomKeyboardEvent) {
-  const e = getKeyboardEvent(event);
-  return e.altKey || e.ctrlKey || e.metaKey || e.shiftKey;
-}
-
-export function isShiftPressed(event: CustomKeyboardEvent) {
-  const e = getKeyboardEvent(event);
+export function shiftPressed(e: KeyboardEvent) {
   return e.shiftKey;
 }
 
-export function getKeyboardEvent(e: CustomKeyboardEvent): CustomKeyboardEvent {
-  const event = dom(e.detail ? e.detail.keyboardEvent : e);
-  // TODO(TS): worth checking if this still holds or not, if no, remove this.
-  // When e is a keyboardEvent, e.event is not null.
-  if ('event' in event && (event as CustomKeyboardEvent).event) {
-    return (event as CustomKeyboardEvent).event;
-  }
-  return event as CustomKeyboardEvent;
+export function isModifierPressed(e: IronKeyboardEvent) {
+  return modifierPressed(e.detail.keyboardEvent);
+}
+
+export function isShiftPressed(e: IronKeyboardEvent) {
+  return shiftPressed(e.detail.keyboardEvent);
 }
diff --git a/polygerrit-ui/app/utils/path-list-util.ts b/polygerrit-ui/app/utils/path-list-util.ts
index fd922fc..411421e 100644
--- a/polygerrit-ui/app/utils/path-list-util.ts
+++ b/polygerrit-ui/app/utils/path-list-util.ts
@@ -95,13 +95,13 @@
   });
 }
 
-export function computeDisplayPath(path: string) {
+export function computeDisplayPath(path?: string) {
   if (path === SpecialFilePath.COMMIT_MESSAGE) {
     return 'Commit message';
   } else if (path === SpecialFilePath.MERGE_LIST) {
     return 'Merge list';
   }
-  return path;
+  return path ?? '';
 }
 
 export function isMagicPath(path?: string) {
diff --git a/tools/BUILD b/tools/BUILD
index 1bace53..64b0665 100644
--- a/tools/BUILD
+++ b/tools/BUILD
@@ -202,7 +202,7 @@
         "-Xep:FromTemporalAccessor:ERROR",
         "-Xep:FunctionalInterfaceClash:ERROR",
         "-Xep:FunctionalInterfaceMethodChanged:ERROR",
-        "-Xep:FutureReturnValueIgnored:ERROR",
+        # "-Xep:FutureReturnValueIgnored:ERROR", // this check has a bug.
         "-Xep:FuturesGetCheckedIllegalExceptionType:ERROR",
         "-Xep:GetClassOnAnnotation:ERROR",
         "-Xep:GetClassOnClass:ERROR",
diff --git a/yarn.lock b/yarn.lock
index 17c08c3..3ddfac6 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -30,6 +30,13 @@
     chalk "^2.0.0"
     js-tokens "^4.0.0"
 
+"@babel/runtime@^7.10.2":
+  version "7.15.4"
+  resolved "https://registry.yarnpkg.com/@babel/runtime/-/runtime-7.15.4.tgz#fd17d16bfdf878e6dd02d19753a39fa8a8d9c84a"
+  integrity sha512-99catp6bHCaxr4sJ/DbTGgHS4+Rs2RVd2g7iOap6SLGPDknRK9ztKNsE/Fg6QhSeh1FGE5f6gHGQmvvn3I3xhw==
+  dependencies:
+    regenerator-runtime "^0.13.4"
+
 "@bazel/rollup@^3.5.0":
   version "3.8.0"
   resolved "https://registry.yarnpkg.com/@bazel/rollup/-/rollup-3.8.0.tgz#850f56176d73e3b7d99a43c7e33df21ecc6ac161"
@@ -79,6 +86,14 @@
   resolved "https://registry.yarnpkg.com/@humanwhocodes/object-schema/-/object-schema-1.2.0.tgz#87de7af9c231826fdd68ac7258f77c429e0e5fcf"
   integrity sha512-wdppn25U8z/2yiaT6YGquE6X8sSv7hNMWSXYSSU1jGv/yd6XqjXgTDJ8KP4NgjTXfJ3GbRjeeb8RTV7a/VpM+w==
 
+"@mrmlnc/readdir-enhanced@^2.2.1":
+  version "2.2.1"
+  resolved "https://registry.yarnpkg.com/@mrmlnc/readdir-enhanced/-/readdir-enhanced-2.2.1.tgz#524af240d1a360527b730475ecfa1344aa540dde"
+  integrity sha512-bPHp6Ji8b41szTOcaP63VlnbbO5Ny6dwAATtY6JTjh5N2OLrb5Qk/Th5cRkRQhkWCt+EJsYrNB0MiL+Gpn6e3g==
+  dependencies:
+    call-me-maybe "^1.0.1"
+    glob-to-regexp "^0.3.0"
+
 "@nodelib/fs.scandir@2.1.5":
   version "2.1.5"
   resolved "https://registry.yarnpkg.com/@nodelib/fs.scandir/-/fs.scandir-2.1.5.tgz#7619c2eb21b25483f6d167548b4cfd5a7488c3d5"
@@ -92,6 +107,11 @@
   resolved "https://registry.yarnpkg.com/@nodelib/fs.stat/-/fs.stat-2.0.5.tgz#5bd262af94e9d25bd1e71b05deed44876a222e8b"
   integrity sha512-RkhPPp2zrqDAQA/2jNhnztcPAlv64XdhIp7a7454A5ovI7Bukxgt7MX7udwAu3zg1DcpPU0rz3VV1SeaqvY4+A==
 
+"@nodelib/fs.stat@^1.1.2":
+  version "1.1.3"
+  resolved "https://registry.yarnpkg.com/@nodelib/fs.stat/-/fs.stat-1.1.3.tgz#2b5a3ab3f918cca48a8c754c08168e3f03eba61b"
+  integrity sha512-shAmDyaQC4H92APFoIaVDHCx5bStIocgvbwQyxPRrbUY20V1EYTbSDchWbuwlMG3V17cprZhA6+78JfB+3DTPw==
+
 "@nodelib/fs.walk@^1.2.3":
   version "1.2.8"
   resolved "https://registry.yarnpkg.com/@nodelib/fs.walk/-/fs.walk-1.2.8.tgz#e95737e8bb6746ddedf69c556953494f196fe69a"
@@ -354,6 +374,21 @@
   dependencies:
     sprintf-js "~1.0.2"
 
+arr-diff@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/arr-diff/-/arr-diff-4.0.0.tgz#d6461074febfec71e7e15235761a329a5dc7c520"
+  integrity sha1-1kYQdP6/7HHn4VI1dhoyml3HxSA=
+
+arr-flatten@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/arr-flatten/-/arr-flatten-1.1.0.tgz#36048bbff4e7b47e136644316c99669ea5ae91f1"
+  integrity sha512-L3hKV5R/p5o81R7O02IGnwpDmkp6E982XhtbuwSe3O4qOtMMMtodicASA1Cny2U+aCXcNpml+m4dPsvsJ3jatg==
+
+arr-union@^3.1.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/arr-union/-/arr-union-3.1.0.tgz#e39b09aea9def866a8f206e288af63919bae39c4"
+  integrity sha1-45sJrqne+Gao8gbiiK9jkZuuOcQ=
+
 array-includes@^3.1.3:
   version "3.1.3"
   resolved "https://registry.yarnpkg.com/array-includes/-/array-includes-3.1.3.tgz#c7f619b382ad2afaf5326cddfdc0afc61af7690a"
@@ -370,6 +405,11 @@
   resolved "https://registry.yarnpkg.com/array-union/-/array-union-2.1.0.tgz#b798420adbeb1de828d84acd8a2e23d3efe85e8d"
   integrity sha512-HGyxoOTYUyCM6stUe6EJgnd4EoewAI7zMdfqO+kGjnlZmBDz/cR5pf8r/cR4Wq60sL/p0IkcjUEEPwS3GFrIyw==
 
+array-unique@^0.3.2:
+  version "0.3.2"
+  resolved "https://registry.yarnpkg.com/array-unique/-/array-unique-0.3.2.tgz#a894b75d4bc4f6cd679ef3244a9fd8f46ae2d428"
+  integrity sha1-qJS3XUvE9s1nnvMkSp/Y9Gri1Cg=
+
 array.prototype.flat@^1.2.4:
   version "1.2.4"
   resolved "https://registry.yarnpkg.com/array.prototype.flat/-/array.prototype.flat-1.2.4.tgz#6ef638b43312bd401b4c6199fdec7e2dc9e9a123"
@@ -384,16 +424,39 @@
   resolved "https://registry.yarnpkg.com/arrify/-/arrify-1.0.1.tgz#898508da2226f380df904728456849c1501a4b0d"
   integrity sha1-iYUI2iIm84DfkEcoRWhJwVAaSw0=
 
+assign-symbols@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/assign-symbols/-/assign-symbols-1.0.0.tgz#59667f41fadd4f20ccbc2bb96b8d4f7f78ec0367"
+  integrity sha1-WWZ/QfrdTyDMvCu5a41Pf3jsA2c=
+
 astral-regex@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/astral-regex/-/astral-regex-2.0.0.tgz#483143c567aeed4785759c0865786dc77d7d2e31"
   integrity sha512-Z7tMw1ytTXt5jqMcOP+OQteU1VuNK9Y02uuJtKQ1Sv69jXQKKg5cibLwGJow8yzZP+eAc18EmLGPal0bp36rvQ==
 
+atob@^2.1.2:
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/atob/-/atob-2.1.2.tgz#6d9517eb9e030d2436666651e86bd9f6f13533c9"
+  integrity sha512-Wm6ukoaOGJi/73p/cl2GvLjTI5JM1k/O14isD73YML8StrH/7/lRFgmg8nICZgD3bZZvjwCGxtMOD3wWNAu8cg==
+
 balanced-match@^1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/balanced-match/-/balanced-match-1.0.2.tgz#e83e3a7e3f300b34cb9d87f615fa0cbf357690ee"
   integrity sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw==
 
+base@^0.11.1:
+  version "0.11.2"
+  resolved "https://registry.yarnpkg.com/base/-/base-0.11.2.tgz#7bde5ced145b6d551a90db87f83c558b4eb48a8f"
+  integrity sha512-5T6P4xPgpp0YDFvSWwEZ4NoE3aM4QBQXDzmVbraCkFj8zHM+mba8SyqB5DbZWyR7mYHo6Y7BdQo3MoA4m0TeQg==
+  dependencies:
+    cache-base "^1.0.1"
+    class-utils "^0.3.5"
+    component-emitter "^1.2.1"
+    define-property "^1.0.0"
+    isobject "^3.0.1"
+    mixin-deep "^1.2.0"
+    pascalcase "^0.1.1"
+
 boolbase@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/boolbase/-/boolbase-1.0.0.tgz#68dff5fbe60c51eb37725ea9e3ed310dcc1e776e"
@@ -421,6 +484,22 @@
     balanced-match "^1.0.0"
     concat-map "0.0.1"
 
+braces@^2.3.1:
+  version "2.3.2"
+  resolved "https://registry.yarnpkg.com/braces/-/braces-2.3.2.tgz#5979fd3f14cd531565e5fa2df1abfff1dfaee729"
+  integrity sha512-aNdbnj9P8PjdXU4ybaWLK2IF3jc/EoDYbC7AazW6to3TRsfXxscC9UXOB5iDiEQrkyIbWp2SLQda4+QAa7nc3w==
+  dependencies:
+    arr-flatten "^1.1.0"
+    array-unique "^0.3.2"
+    extend-shallow "^2.0.1"
+    fill-range "^4.0.0"
+    isobject "^3.0.1"
+    repeat-element "^1.1.2"
+    snapdragon "^0.8.1"
+    snapdragon-node "^2.0.1"
+    split-string "^3.0.2"
+    to-regex "^3.0.1"
+
 braces@^3.0.1:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/braces/-/braces-3.0.2.tgz#3454e1a462ee8d599e236df336cd9ea4f8afe107"
@@ -433,6 +512,21 @@
   resolved "https://registry.yarnpkg.com/buffer-from/-/buffer-from-1.1.2.tgz#2b146a6fd72e80b4f55d255f35ed59a3a9a41bd5"
   integrity sha512-E+XQCRwSbaaiChtv6k6Dwgc+bx+Bs6vuKJHHl5kox/BaKbhiXzqQOwK4cO22yElGp2OCmjwVhT3HmxgyPGnJfQ==
 
+cache-base@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/cache-base/-/cache-base-1.0.1.tgz#0a7f46416831c8b662ee36fe4e7c59d76f666ab2"
+  integrity sha512-AKcdTnFSWATd5/GCPRxr2ChwIJ85CeyrEyjRHlKxQ56d4XJMGym0uAiKn0xbLOGOl3+yRpOTi484dVCEc5AUzQ==
+  dependencies:
+    collection-visit "^1.0.0"
+    component-emitter "^1.2.1"
+    get-value "^2.0.6"
+    has-value "^1.0.0"
+    isobject "^3.0.1"
+    set-value "^2.0.0"
+    to-object-path "^0.3.0"
+    union-value "^1.0.0"
+    unset-value "^1.0.0"
+
 cacheable-request@^6.0.0:
   version "6.1.0"
   resolved "https://registry.yarnpkg.com/cacheable-request/-/cacheable-request-6.1.0.tgz#20ffb8bd162ba4be11e9567d823db651052ca912"
@@ -454,6 +548,11 @@
     function-bind "^1.1.1"
     get-intrinsic "^1.0.2"
 
+call-me-maybe@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/call-me-maybe/-/call-me-maybe-1.0.1.tgz#26d208ea89e37b5cbde60250a15f031c16a4d66b"
+  integrity sha1-JtII6onje1y95gJQoV8DHBak1ms=
+
 callsites@^3.0.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/callsites/-/callsites-3.1.0.tgz#b3630abd8943432f54b3f0519238e33cd7df2f73"
@@ -468,7 +567,7 @@
     map-obj "^4.0.0"
     quick-lru "^4.0.1"
 
-camelcase@^5.3.1:
+camelcase@^5.0.0, camelcase@^5.3.1:
   version "5.3.1"
   resolved "https://registry.yarnpkg.com/camelcase/-/camelcase-5.3.1.tgz#e3c9b31569e106811df242f715725a1f4c494320"
   integrity sha512-L28STB170nwWS63UjtlEOE3dldQApaJXZkOI1uMFfzf3rRuPegHaHesyee+YxQ+W6SvRDQV6UrdOdRiR153wJg==
@@ -478,7 +577,7 @@
   resolved "https://registry.yarnpkg.com/camelcase/-/camelcase-6.2.0.tgz#924af881c9d525ac9d87f40d964e5cea982a1809"
   integrity sha512-c7wVvbw3f37nuobQNtgsgG9POC9qMbNuMQmTCqZv23b6MIz0fcYpBiOlv9gEN/hdLdnZTDQhg6e9Dq5M1vKvfg==
 
-chalk@^2.0.0:
+chalk@^2.0.0, chalk@^2.4.2:
   version "2.4.2"
   resolved "https://registry.yarnpkg.com/chalk/-/chalk-2.4.2.tgz#cd42541677a54333cf541a49108c1432b44c9424"
   integrity sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==
@@ -517,6 +616,16 @@
   resolved "https://registry.yarnpkg.com/ci-info/-/ci-info-2.0.0.tgz#67a9e964be31a51e15e5010d58e6f12834002f46"
   integrity sha512-5tK7EtrZ0N+OLFMthtqOj4fI2Jeb88C4CAZPu25LDVUgXJ0A3Js4PMGqrn0JU1W0Mh1/Z8wZzYPxqUrXeBboCQ==
 
+class-utils@^0.3.5:
+  version "0.3.6"
+  resolved "https://registry.yarnpkg.com/class-utils/-/class-utils-0.3.6.tgz#f93369ae8b9a7ce02fd41faad0ca83033190c463"
+  integrity sha512-qOhPa/Fj7s6TY8H8esGu5QNpMMQxz79h+urzrNYN6mn+9BnxlDGf5QZ+XeCDsxSjPqsSR56XOZOJmpeurnLMeg==
+  dependencies:
+    arr-union "^3.1.0"
+    define-property "^0.2.5"
+    isobject "^3.0.0"
+    static-extend "^0.1.1"
+
 cli-boxes@^2.2.1:
   version "2.2.1"
   resolved "https://registry.yarnpkg.com/cli-boxes/-/cli-boxes-2.2.1.tgz#ddd5035d25094fce220e9cab40a45840a440318f"
@@ -534,6 +643,15 @@
   resolved "https://registry.yarnpkg.com/cli-width/-/cli-width-3.0.0.tgz#a2f48437a2caa9a22436e794bf071ec9e61cedf6"
   integrity sha512-FxqpkPPwu1HjuN93Omfm4h8uIanXofW0RxVEW3k5RKx+mJJYSthzNhp32Kzxxy3YAEZ/Dc/EWN1vZRY0+kOhbw==
 
+cliui@^6.0.0:
+  version "6.0.0"
+  resolved "https://registry.yarnpkg.com/cliui/-/cliui-6.0.0.tgz#511d702c0c4e41ca156d7d0e96021f23e13225b1"
+  integrity sha512-t6wbgtoCXvAzst7QgXxJYqPt0usEfbgQdftEPbLL/cvv6HPE5VgvqCuAIDR0NgU52ds6rFwqrgakNLrHEjCbrQ==
+  dependencies:
+    string-width "^4.2.0"
+    strip-ansi "^6.0.0"
+    wrap-ansi "^6.2.0"
+
 clone-response@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/clone-response/-/clone-response-1.0.2.tgz#d1dc973920314df67fbeb94223b4ee350239e96b"
@@ -541,6 +659,14 @@
   dependencies:
     mimic-response "^1.0.0"
 
+collection-visit@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/collection-visit/-/collection-visit-1.0.0.tgz#4bc0373c164bc3291b4d368c829cf1a80a59dca0"
+  integrity sha1-S8A3PBZLwykbTTaMgpzxqApZ3KA=
+  dependencies:
+    map-visit "^1.0.0"
+    object-visit "^1.0.0"
+
 color-convert@^1.9.0:
   version "1.9.3"
   resolved "https://registry.yarnpkg.com/color-convert/-/color-convert-1.9.3.tgz#bb71850690e1f136567de629d2d5471deda4c1e8"
@@ -575,6 +701,11 @@
   resolved "https://registry.yarnpkg.com/comment-parser/-/comment-parser-1.1.5.tgz#453627ef8f67dbcec44e79a9bd5baa37f0bce9b2"
   integrity sha512-RePCE4leIhBlmrqiYTvaqEeGYg7qpSl4etaIabKtdOQVi+mSTIBBklGUwIr79GXYnl3LpMwmDw4KeR2stNc6FA==
 
+component-emitter@^1.2.1:
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/component-emitter/-/component-emitter-1.3.0.tgz#16e4070fba8ae29b679f2215853ee181ab2eabc0"
+  integrity sha512-Rd3se6QB+sO1TwqZjscQrurpEPIfO0/yYnSin6Q/rD3mOutHvUrCAhJub3r90uNb+SESBuE0QYoB90YdfatsRg==
+
 concat-map@0.0.1:
   version "0.0.1"
   resolved "https://registry.yarnpkg.com/concat-map/-/concat-map-0.0.1.tgz#d8a96bd77fd68df7793a73036a3ba0d5405d477b"
@@ -592,6 +723,11 @@
     write-file-atomic "^3.0.0"
     xdg-basedir "^4.0.0"
 
+copy-descriptor@^0.1.0:
+  version "0.1.1"
+  resolved "https://registry.yarnpkg.com/copy-descriptor/-/copy-descriptor-0.1.1.tgz#676f6eb3c39997c2ee1ac3a924fd6124748f578d"
+  integrity sha1-Z29us8OZl8LuGsOpJP1hJHSPV40=
+
 cross-spawn@^7.0.2, cross-spawn@^7.0.3:
   version "7.0.3"
   resolved "https://registry.yarnpkg.com/cross-spawn/-/cross-spawn-7.0.3.tgz#f73a85b9d5d41d045551c177e2882d4ac85728a6"
@@ -621,7 +757,7 @@
   resolved "https://registry.yarnpkg.com/css-what/-/css-what-2.1.3.tgz#a6d7604573365fe74686c3f311c56513d88285f2"
   integrity sha512-a+EPoD+uZiNfh+5fxw2nO9QwFa6nJe2Or35fGY6Ipw1R3R4AGz1d1TEZrCegvw2YTmZ0jXirGYlzxxpYSHwpEg==
 
-debug@^2.6.9:
+debug@^2.2.0, debug@^2.3.3, debug@^2.6.9:
   version "2.6.9"
   resolved "https://registry.yarnpkg.com/debug/-/debug-2.6.9.tgz#5d128515df134ff327e90a4c93f4e077a536341f"
   integrity sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==
@@ -655,6 +791,11 @@
   resolved "https://registry.yarnpkg.com/decamelize/-/decamelize-1.2.0.tgz#f6534d15148269b20352e7bee26f501f9a191290"
   integrity sha1-9lNNFRSCabIDUue+4m9QH5oZEpA=
 
+decode-uri-component@^0.2.0:
+  version "0.2.0"
+  resolved "https://registry.yarnpkg.com/decode-uri-component/-/decode-uri-component-0.2.0.tgz#eb3913333458775cb84cd1a1fae062106bb87545"
+  integrity sha1-6zkTMzRYd1y4TNGh+uBiEGu4dUU=
+
 decompress-response@^3.3.0:
   version "3.3.0"
   resolved "https://registry.yarnpkg.com/decompress-response/-/decompress-response-3.3.0.tgz#80a4dd323748384bfa248083622aedec982adff3"
@@ -684,6 +825,37 @@
   dependencies:
     object-keys "^1.0.12"
 
+define-property@^0.2.5:
+  version "0.2.5"
+  resolved "https://registry.yarnpkg.com/define-property/-/define-property-0.2.5.tgz#c35b1ef918ec3c990f9a5bc57be04aacec5c8116"
+  integrity sha1-w1se+RjsPJkPmlvFe+BKrOxcgRY=
+  dependencies:
+    is-descriptor "^0.1.0"
+
+define-property@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/define-property/-/define-property-1.0.0.tgz#769ebaaf3f4a63aad3af9e8d304c9bbe79bfb0e6"
+  integrity sha1-dp66rz9KY6rTr56NMEybvnm/sOY=
+  dependencies:
+    is-descriptor "^1.0.0"
+
+define-property@^2.0.2:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/define-property/-/define-property-2.0.2.tgz#d459689e8d654ba77e02a817f8710d702cb16e9d"
+  integrity sha512-jwK2UV4cnPpbcG7+VRARKTZPUWowwXA8bzH5NP6ud0oeAxyYPuGZUAC7hMugpCdz4BeSZl2Dl9k66CHJ/46ZYQ==
+  dependencies:
+    is-descriptor "^1.0.2"
+    isobject "^3.0.1"
+
+didyoumean2@4.1.0:
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/didyoumean2/-/didyoumean2-4.1.0.tgz#f813cb7c82c249443e599be077f76e88f24b85e4"
+  integrity sha512-qTBmfQoXvhKO75D/05C8m+fteQmn4U46FWYiLhXtZQInzitXLWY0EQ/2oKnpAz9g2lQWW8jYcLcT+hPJGT+kig==
+  dependencies:
+    "@babel/runtime" "^7.10.2"
+    leven "^3.1.0"
+    lodash.deburr "^4.1.0"
+
 dir-glob@^3.0.1:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/dir-glob/-/dir-glob-3.0.1.tgz#56dbf73d992a4a93ba1584f4534063fd2e41717f"
@@ -1123,6 +1295,34 @@
     signal-exit "^3.0.3"
     strip-final-newline "^2.0.0"
 
+expand-brackets@^2.1.4:
+  version "2.1.4"
+  resolved "https://registry.yarnpkg.com/expand-brackets/-/expand-brackets-2.1.4.tgz#b77735e315ce30f6b6eff0f83b04151a22449622"
+  integrity sha1-t3c14xXOMPa27/D4OwQVGiJEliI=
+  dependencies:
+    debug "^2.3.3"
+    define-property "^0.2.5"
+    extend-shallow "^2.0.1"
+    posix-character-classes "^0.1.0"
+    regex-not "^1.0.0"
+    snapdragon "^0.8.1"
+    to-regex "^3.0.1"
+
+extend-shallow@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/extend-shallow/-/extend-shallow-2.0.1.tgz#51af7d614ad9a9f610ea1bafbb989d6b1c56890f"
+  integrity sha1-Ua99YUrZqfYQ6huvu5idaxxWiQ8=
+  dependencies:
+    is-extendable "^0.1.0"
+
+extend-shallow@^3.0.0, extend-shallow@^3.0.2:
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/extend-shallow/-/extend-shallow-3.0.2.tgz#26a71aaf073b39fb2127172746131c2704028db8"
+  integrity sha1-Jqcarwc7OfshJxcnRhMcJwQCjbg=
+  dependencies:
+    assign-symbols "^1.0.0"
+    is-extendable "^1.0.1"
+
 external-editor@^3.0.3:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/external-editor/-/external-editor-3.1.0.tgz#cb03f740befae03ea4d283caed2741a83f335495"
@@ -1132,6 +1332,20 @@
     iconv-lite "^0.4.24"
     tmp "^0.0.33"
 
+extglob@^2.0.4:
+  version "2.0.4"
+  resolved "https://registry.yarnpkg.com/extglob/-/extglob-2.0.4.tgz#ad00fe4dc612a9232e8718711dc5cb5ab0285543"
+  integrity sha512-Nmb6QXkELsuBr24CJSkilo6UHHgbekK5UiZgfE6UHD3Eb27YC6oD+bhcT+tJ6cl8dmsgdQxnWlcry8ksBIBLpw==
+  dependencies:
+    array-unique "^0.3.2"
+    define-property "^1.0.0"
+    expand-brackets "^2.1.4"
+    extend-shallow "^2.0.1"
+    fragment-cache "^0.2.1"
+    regex-not "^1.0.0"
+    snapdragon "^0.8.1"
+    to-regex "^3.0.1"
+
 fast-deep-equal@^3.1.1, fast-deep-equal@^3.1.3:
   version "3.1.3"
   resolved "https://registry.yarnpkg.com/fast-deep-equal/-/fast-deep-equal-3.1.3.tgz#3a7d56b559d6cbc3eb512325244e619a65c6c525"
@@ -1142,7 +1356,19 @@
   resolved "https://registry.yarnpkg.com/fast-diff/-/fast-diff-1.2.0.tgz#73ee11982d86caaf7959828d519cfe927fac5f03"
   integrity sha512-xJuoT5+L99XlZ8twedaRf6Ax2TgQVxvgZOYoPKqZufmJib0tL2tegPBOZb1pVNgIhlqDlA0eO0c3wBvQcmzx4w==
 
-fast-glob@^3.1.1:
+fast-glob@^2.2.6:
+  version "2.2.7"
+  resolved "https://registry.yarnpkg.com/fast-glob/-/fast-glob-2.2.7.tgz#6953857c3afa475fff92ee6015d52da70a4cd39d"
+  integrity sha512-g1KuQwHOZAmOZMuBtHdxDtju+T2RT8jgCC9aANsbpdiDDTSnjgfuVsIBNKbUeJI3oKMRExcfNDtJl4OhbffMsw==
+  dependencies:
+    "@mrmlnc/readdir-enhanced" "^2.2.1"
+    "@nodelib/fs.stat" "^1.1.2"
+    glob-parent "^3.1.0"
+    is-glob "^4.0.0"
+    merge2 "^1.2.3"
+    micromatch "^3.1.10"
+
+fast-glob@^3.1.1, fast-glob@^3.2.2:
   version "3.2.7"
   resolved "https://registry.yarnpkg.com/fast-glob/-/fast-glob-3.2.7.tgz#fd6cb7a2d7e9aa7a7846111e85a196d6b2f766a1"
   integrity sha512-rYGMRwip6lUMvYD3BTScMwT1HtAs2d71SMv66Vrxs0IekGZEjhM0pcMfjQPnknBt2zeCwQMEupiN02ZP4DiT1Q==
@@ -1184,6 +1410,16 @@
   dependencies:
     flat-cache "^3.0.4"
 
+fill-range@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/fill-range/-/fill-range-4.0.0.tgz#d544811d428f98eb06a63dc402d2403c328c38f7"
+  integrity sha1-1USBHUKPmOsGpj3EAtJAPDKMOPc=
+  dependencies:
+    extend-shallow "^2.0.1"
+    is-number "^3.0.0"
+    repeat-string "^1.6.1"
+    to-regex-range "^2.1.0"
+
 fill-range@^7.0.1:
   version "7.0.1"
   resolved "https://registry.yarnpkg.com/fill-range/-/fill-range-7.0.1.tgz#1919a6a7c75fe38b2c7c77e5198535da9acdda40"
@@ -1219,6 +1455,18 @@
   resolved "https://registry.yarnpkg.com/flatted/-/flatted-3.2.2.tgz#64bfed5cb68fe3ca78b3eb214ad97b63bedce561"
   integrity sha512-JaTY/wtrcSyvXJl4IMFHPKyFur1sE9AUqc0QnhOaJ0CxHtAoIV8pYDzeEfAaNEtGkOfq4gr3LBFmdXW5mOQFnA==
 
+for-in@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/for-in/-/for-in-1.0.2.tgz#81068d295a8142ec0ac726c6e2200c30fb6d5e80"
+  integrity sha1-gQaNKVqBQuwKxybG4iAMMPttXoA=
+
+fragment-cache@^0.2.1:
+  version "0.2.1"
+  resolved "https://registry.yarnpkg.com/fragment-cache/-/fragment-cache-0.2.1.tgz#4290fad27f13e89be7f33799c6bc5a0abfff0d19"
+  integrity sha1-QpD60n8T6Jvn8zeZxrxaCr//DRk=
+  dependencies:
+    map-cache "^0.2.2"
+
 fs.realpath@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/fs.realpath/-/fs.realpath-1.0.0.tgz#1504ad2523158caa40db4a2787cb01411994ea4f"
@@ -1239,6 +1487,11 @@
   resolved "https://registry.yarnpkg.com/functional-red-black-tree/-/functional-red-black-tree-1.0.1.tgz#1b0ab3bd553b2a0d6399d29c0e3ea0b252078327"
   integrity sha1-GwqzvVU7Kg1jmdKcDj6gslIHgyc=
 
+get-caller-file@^2.0.1:
+  version "2.0.5"
+  resolved "https://registry.yarnpkg.com/get-caller-file/-/get-caller-file-2.0.5.tgz#4f94412a82db32f36e3b0b9741f8a97feb031f7e"
+  integrity sha512-DyFP3BM/3YHTQOCUL/w0OZHR0lpKeGrxotcHWcqNEdnltqFwXVfhEBQ94eIo34AfQpo0rGki4cyIiftY06h2Fg==
+
 get-intrinsic@^1.0.2, get-intrinsic@^1.1.0, get-intrinsic@^1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/get-intrinsic/-/get-intrinsic-1.1.1.tgz#15f59f376f855c446963948f0d24cd3637b4abc6"
@@ -1267,6 +1520,19 @@
   resolved "https://registry.yarnpkg.com/get-stream/-/get-stream-6.0.1.tgz#a262d8eef67aced57c2852ad6167526a43cbf7b7"
   integrity sha512-ts6Wi+2j3jQjqi70w5AlN8DFnkSwC+MqmxEzdEALB2qXZYV3X/b1CTfgPLGJNMeAWxdPfU8FO1ms3NUfaHCPYg==
 
+get-value@^2.0.3, get-value@^2.0.6:
+  version "2.0.6"
+  resolved "https://registry.yarnpkg.com/get-value/-/get-value-2.0.6.tgz#dc15ca1c672387ca76bd37ac0a395ba2042a2c28"
+  integrity sha1-3BXKHGcjh8p2vTesCjlbogQqLCg=
+
+glob-parent@^3.1.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/glob-parent/-/glob-parent-3.1.0.tgz#9e6af6299d8d3bd2bd40430832bd113df906c5ae"
+  integrity sha1-nmr2KZ2NO9K9QEMIMr0RPfkGxa4=
+  dependencies:
+    is-glob "^3.1.0"
+    path-dirname "^1.0.0"
+
 glob-parent@^5.1.2:
   version "5.1.2"
   resolved "https://registry.yarnpkg.com/glob-parent/-/glob-parent-5.1.2.tgz#869832c58034fe68a4093c17dc15e8340d8401c4"
@@ -1274,6 +1540,11 @@
   dependencies:
     is-glob "^4.0.1"
 
+glob-to-regexp@^0.3.0:
+  version "0.3.0"
+  resolved "https://registry.yarnpkg.com/glob-to-regexp/-/glob-to-regexp-0.3.0.tgz#8c5a1494d2066c570cc3bfe4496175acc4d502ab"
+  integrity sha1-jFoUlNIGbFcMw7/kSWF1rMTVAqs=
+
 glob@^7.1.3:
   version "7.1.7"
   resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.7.tgz#3b193e9233f01d42d0b3f78294bbeeb418f94a90"
@@ -1388,6 +1659,37 @@
   dependencies:
     has-symbols "^1.0.2"
 
+has-value@^0.3.1:
+  version "0.3.1"
+  resolved "https://registry.yarnpkg.com/has-value/-/has-value-0.3.1.tgz#7b1f58bada62ca827ec0a2078025654845995e1f"
+  integrity sha1-ex9YutpiyoJ+wKIHgCVlSEWZXh8=
+  dependencies:
+    get-value "^2.0.3"
+    has-values "^0.1.4"
+    isobject "^2.0.0"
+
+has-value@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/has-value/-/has-value-1.0.0.tgz#18b281da585b1c5c51def24c930ed29a0be6b177"
+  integrity sha1-GLKB2lhbHFxR3vJMkw7SmgvmsXc=
+  dependencies:
+    get-value "^2.0.6"
+    has-values "^1.0.0"
+    isobject "^3.0.0"
+
+has-values@^0.1.4:
+  version "0.1.4"
+  resolved "https://registry.yarnpkg.com/has-values/-/has-values-0.1.4.tgz#6d61de95d91dfca9b9a02089ad384bff8f62b771"
+  integrity sha1-bWHeldkd/Km5oCCJrThL/49it3E=
+
+has-values@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/has-values/-/has-values-1.0.0.tgz#95b0b63fec2146619a6fe57fe75628d5a39efe4f"
+  integrity sha1-lbC2P+whRmGab+V/51Yo1aOe/k8=
+  dependencies:
+    is-number "^3.0.0"
+    kind-of "^4.0.0"
+
 has-yarn@^2.1.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/has-yarn/-/has-yarn-2.1.0.tgz#137e11354a7b5bf11aa5cb649cf0c6f3ff2b2e77"
@@ -1535,6 +1837,20 @@
     has "^1.0.3"
     side-channel "^1.0.4"
 
+is-accessor-descriptor@^0.1.6:
+  version "0.1.6"
+  resolved "https://registry.yarnpkg.com/is-accessor-descriptor/-/is-accessor-descriptor-0.1.6.tgz#a9e12cb3ae8d876727eeef3843f8a0897b5c98d6"
+  integrity sha1-qeEss66Nh2cn7u84Q/igiXtcmNY=
+  dependencies:
+    kind-of "^3.0.2"
+
+is-accessor-descriptor@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/is-accessor-descriptor/-/is-accessor-descriptor-1.0.0.tgz#169c2f6d3df1f992618072365c9b0ea1f6878656"
+  integrity sha512-m5hnHTkcVsPfqx3AKlyttIPb7J+XykHvJP2B9bZDjlhLIoEq4XoK64Vg7boZlVWYK6LUY94dYPEE7Lh0ZkZKcQ==
+  dependencies:
+    kind-of "^6.0.0"
+
 is-arrayish@^0.2.1:
   version "0.2.1"
   resolved "https://registry.yarnpkg.com/is-arrayish/-/is-arrayish-0.2.1.tgz#77c99840527aa8ecb1a8ba697b80645a7a926a9d"
@@ -1555,6 +1871,11 @@
     call-bind "^1.0.2"
     has-tostringtag "^1.0.0"
 
+is-buffer@^1.1.5:
+  version "1.1.6"
+  resolved "https://registry.yarnpkg.com/is-buffer/-/is-buffer-1.1.6.tgz#efaa2ea9daa0d7ab2ea13a97b2b8ad51fefbe8be"
+  integrity sha512-NcdALwpXkTm5Zvvbk7owOUSvVvBKDgKP5/ewfXEznmQFfs4ZRmanOeKBTjRVjka3QFoN6XJ+9F3USqfHqTaU5w==
+
 is-callable@^1.1.4, is-callable@^1.2.3:
   version "1.2.4"
   resolved "https://registry.yarnpkg.com/is-callable/-/is-callable-1.2.4.tgz#47301d58dd0259407865547853df6d61fe471945"
@@ -1574,6 +1895,20 @@
   dependencies:
     has "^1.0.3"
 
+is-data-descriptor@^0.1.4:
+  version "0.1.4"
+  resolved "https://registry.yarnpkg.com/is-data-descriptor/-/is-data-descriptor-0.1.4.tgz#0b5ee648388e2c860282e793f1856fec3f301b56"
+  integrity sha1-C17mSDiOLIYCgueT8YVv7D8wG1Y=
+  dependencies:
+    kind-of "^3.0.2"
+
+is-data-descriptor@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/is-data-descriptor/-/is-data-descriptor-1.0.0.tgz#d84876321d0e7add03990406abbbbd36ba9268c7"
+  integrity sha512-jbRXy1FmtAoCjQkVmIVYwuuqDFUbaOeDjmed1tOGPrsMhtJA4rD9tkgA0F1qJ3gRFRXcHYVkdeaP50Q5rE/jLQ==
+  dependencies:
+    kind-of "^6.0.0"
+
 is-date-object@^1.0.1:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/is-date-object/-/is-date-object-1.0.5.tgz#0841d5536e724c25597bf6ea62e1bd38298df31f"
@@ -1581,7 +1916,37 @@
   dependencies:
     has-tostringtag "^1.0.0"
 
-is-extglob@^2.1.1:
+is-descriptor@^0.1.0:
+  version "0.1.6"
+  resolved "https://registry.yarnpkg.com/is-descriptor/-/is-descriptor-0.1.6.tgz#366d8240dde487ca51823b1ab9f07a10a78251ca"
+  integrity sha512-avDYr0SB3DwO9zsMov0gKCESFYqCnE4hq/4z3TdUlukEy5t9C0YRq7HLrsN52NAcqXKaepeCD0n+B0arnVG3Hg==
+  dependencies:
+    is-accessor-descriptor "^0.1.6"
+    is-data-descriptor "^0.1.4"
+    kind-of "^5.0.0"
+
+is-descriptor@^1.0.0, is-descriptor@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/is-descriptor/-/is-descriptor-1.0.2.tgz#3b159746a66604b04f8c81524ba365c5f14d86ec"
+  integrity sha512-2eis5WqQGV7peooDyLmNEPUrps9+SXX5c9pL3xEB+4e9HnGuDa7mB7kHxHw4CbqS9k1T2hOH3miL8n8WtiYVtg==
+  dependencies:
+    is-accessor-descriptor "^1.0.0"
+    is-data-descriptor "^1.0.0"
+    kind-of "^6.0.2"
+
+is-extendable@^0.1.0, is-extendable@^0.1.1:
+  version "0.1.1"
+  resolved "https://registry.yarnpkg.com/is-extendable/-/is-extendable-0.1.1.tgz#62b110e289a471418e3ec36a617d472e301dfc89"
+  integrity sha1-YrEQ4omkcUGOPsNqYX1HLjAd/Ik=
+
+is-extendable@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/is-extendable/-/is-extendable-1.0.1.tgz#a7470f9e426733d81bd81e1155264e3a3507cab4"
+  integrity sha512-arnXMxT1hhoKo9k1LZdmlNyJdDDfy2v0fXjFlmok4+i8ul/6WlbVge9bhM74OpNPQPMGUToDtz+KXa1PneJxOA==
+  dependencies:
+    is-plain-object "^2.0.4"
+
+is-extglob@^2.1.0, is-extglob@^2.1.1:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/is-extglob/-/is-extglob-2.1.1.tgz#a88c02535791f02ed37c76a1b9ea9773c833f8c2"
   integrity sha1-qIwCU1eR8C7TfHahueqXc8gz+MI=
@@ -1596,6 +1961,13 @@
   resolved "https://registry.yarnpkg.com/is-fullwidth-code-point/-/is-fullwidth-code-point-3.0.0.tgz#f116f8064fe90b3f7844a38997c0b75051269f1d"
   integrity sha512-zymm5+u+sCsSWyD9qNaejV3DFvhCKclKdizYaJUuHA83RLjb7nSuGnddCHGv0hk+KY7BMAlsWeK4Ueg6EV6XQg==
 
+is-glob@^3.1.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/is-glob/-/is-glob-3.1.0.tgz#7ba5ae24217804ac70707b96922567486cc3e84a"
+  integrity sha1-e6WuJCF4BKxwcHuWkiVnSGzD6Eo=
+  dependencies:
+    is-extglob "^2.1.0"
+
 is-glob@^4.0.0, is-glob@^4.0.1:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/is-glob/-/is-glob-4.0.1.tgz#7567dbe9f2f5e2467bc77ab83c4a29482407a5dc"
@@ -1628,6 +2000,13 @@
   dependencies:
     has-tostringtag "^1.0.0"
 
+is-number@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/is-number/-/is-number-3.0.0.tgz#24fd6201a4782cf50561c810276afc7d12d71195"
+  integrity sha1-JP1iAaR4LPUFYcgQJ2r8fRLXEZU=
+  dependencies:
+    kind-of "^3.0.2"
+
 is-number@^7.0.0:
   version "7.0.0"
   resolved "https://registry.yarnpkg.com/is-number/-/is-number-7.0.0.tgz#7535345b896734d5f80c4d06c50955527a14f12b"
@@ -1648,6 +2027,13 @@
   resolved "https://registry.yarnpkg.com/is-plain-obj/-/is-plain-obj-1.1.0.tgz#71a50c8429dfca773c92a390a4a03b39fcd51d3e"
   integrity sha1-caUMhCnfync8kqOQpKA7OfzVHT4=
 
+is-plain-object@^2.0.3, is-plain-object@^2.0.4:
+  version "2.0.4"
+  resolved "https://registry.yarnpkg.com/is-plain-object/-/is-plain-object-2.0.4.tgz#2c163b3fafb1b606d9d17928f05c2a1c38e07677"
+  integrity sha512-h5PpgXkWitc38BBMYawTYMWJHFZJVnBquFE57xFpjB8pJFiF6gZ+bU+WyI/yqXiFR5mdLsgYNaPe8uao6Uv9Og==
+  dependencies:
+    isobject "^3.0.1"
+
 is-regex@^1.1.3:
   version "1.1.4"
   resolved "https://registry.yarnpkg.com/is-regex/-/is-regex-1.1.4.tgz#eef5663cd59fa4c0ae339505323df6854bb15958"
@@ -1680,16 +2066,38 @@
   resolved "https://registry.yarnpkg.com/is-typedarray/-/is-typedarray-1.0.0.tgz#e479c80858df0c1b11ddda6940f96011fcda4a9a"
   integrity sha1-5HnICFjfDBsR3dppQPlgEfzaSpo=
 
+is-windows@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/is-windows/-/is-windows-1.0.2.tgz#d1850eb9791ecd18e6182ce12a30f396634bb19d"
+  integrity sha512-eXK1UInq2bPmjyX6e3VHIzMLobc4J94i4AWn+Hpq3OU5KkrRC96OAcR3PRJ/pGu6m8TRnBHP9dkXQVsT/COVIA==
+
 is-yarn-global@^0.3.0:
   version "0.3.0"
   resolved "https://registry.yarnpkg.com/is-yarn-global/-/is-yarn-global-0.3.0.tgz#d502d3382590ea3004893746754c89139973e232"
   integrity sha512-VjSeb/lHmkoyd8ryPVIKvOCn4D1koMqY+vqyjjUfc3xyKtP4dYOxM44sZrnqQSzSds3xyOrUTLTC9LVCVgLngw==
 
+isarray@1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/isarray/-/isarray-1.0.0.tgz#bb935d48582cba168c06834957a54a3e07124f11"
+  integrity sha1-u5NdSFgsuhaMBoNJV6VKPgcSTxE=
+
 isexe@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/isexe/-/isexe-2.0.0.tgz#e8fbf374dc556ff8947a10dcb0572d633f2cfa10"
   integrity sha1-6PvzdNxVb/iUehDcsFctYz8s+hA=
 
+isobject@^2.0.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/isobject/-/isobject-2.1.0.tgz#f065561096a3f1da2ef46272f815c840d87e0c89"
+  integrity sha1-8GVWEJaj8dou9GJy+BXIQNh+DIk=
+  dependencies:
+    isarray "1.0.0"
+
+isobject@^3.0.0, isobject@^3.0.1:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/isobject/-/isobject-3.0.1.tgz#4e431e92b11a9731636aa1f9c8d1ccbcfdab78df"
+  integrity sha1-TkMekrEalzFjaqH5yNHMvP2reN8=
+
 js-tokens@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-4.0.0.tgz#19203fb59991df98e3a287050d4647cdeaf32499"
@@ -1759,7 +2167,26 @@
   dependencies:
     json-buffer "3.0.0"
 
-kind-of@^6.0.3:
+kind-of@^3.0.2, kind-of@^3.0.3, kind-of@^3.2.0:
+  version "3.2.2"
+  resolved "https://registry.yarnpkg.com/kind-of/-/kind-of-3.2.2.tgz#31ea21a734bab9bbb0f32466d893aea51e4a3c64"
+  integrity sha1-MeohpzS6ubuw8yRm2JOupR5KPGQ=
+  dependencies:
+    is-buffer "^1.1.5"
+
+kind-of@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/kind-of/-/kind-of-4.0.0.tgz#20813df3d712928b207378691a45066fae72dd57"
+  integrity sha1-IIE989cSkosgc3hpGkUGb65y3Vc=
+  dependencies:
+    is-buffer "^1.1.5"
+
+kind-of@^5.0.0:
+  version "5.1.0"
+  resolved "https://registry.yarnpkg.com/kind-of/-/kind-of-5.1.0.tgz#729c91e2d857b7a419a1f9aa65685c4c33f5845d"
+  integrity sha512-NGEErnH6F2vUuXDh+OlbcKW7/wOcfdRHaZ7VWtqCztfHri/++YKmP51OdWeGPuqCOba6kk2OTe5d02VmTB80Pw==
+
+kind-of@^6.0.0, kind-of@^6.0.2, kind-of@^6.0.3:
   version "6.0.3"
   resolved "https://registry.yarnpkg.com/kind-of/-/kind-of-6.0.3.tgz#07c05034a6c349fa06e24fa35aa76db4580ce4dd"
   integrity sha512-dcS1ul+9tmeD95T+x28/ehLgd9mENa3LsvDTtzm3vyBEO7RPptvAD+t44WVXaUjTBRcrpFeFlC8WCruUR456hw==
@@ -1771,6 +2198,11 @@
   dependencies:
     package-json "^6.3.0"
 
+leven@^3.1.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/leven/-/leven-3.1.0.tgz#77891de834064cccba82ae7842bb6b14a13ed7f2"
+  integrity sha512-qsda+H8jTaUaN/x5vzW2rzc+8Rw4TAQ/4KjB46IwK5VH+IlVeeeje/EoZRpiXvIqjFgK84QffqPztGI3VBLG1A==
+
 levn@^0.4.1:
   version "0.4.1"
   resolved "https://registry.yarnpkg.com/levn/-/levn-0.4.1.tgz#ae4562c007473b932a6200d403268dd2fffc6ade"
@@ -1784,6 +2216,20 @@
   resolved "https://registry.yarnpkg.com/lines-and-columns/-/lines-and-columns-1.1.6.tgz#1c00c743b433cd0a4e80758f7b64a57440d9ff00"
   integrity sha1-HADHQ7QzzQpOgHWPe2SldEDZ/wA=
 
+lit-analyzer@1.2.1, lit-analyzer@^1.2.1:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/lit-analyzer/-/lit-analyzer-1.2.1.tgz#725331a4019ae870dd631d4dd709d39a237161ea"
+  integrity sha512-OEARBhDidyaQENavLbzpTKbEmu5rnAI+SdYsH4ia1BlGlLiqQXoym7uH1MaRPtwtUPbkhUfT4OBDZ+74VHc3Cg==
+  dependencies:
+    chalk "^2.4.2"
+    didyoumean2 "4.1.0"
+    fast-glob "^2.2.6"
+    parse5 "5.1.0"
+    ts-simple-type "~1.0.5"
+    vscode-css-languageservice "4.3.0"
+    vscode-html-languageservice "3.1.0"
+    web-component-analyzer "~1.1.1"
+
 load-json-file@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/load-json-file/-/load-json-file-4.0.0.tgz#2f5f45ab91e33216234fd53adab668eb4ec0993b"
@@ -1814,6 +2260,11 @@
   resolved "https://registry.yarnpkg.com/lodash.clonedeep/-/lodash.clonedeep-4.5.0.tgz#e23f3f9c4f8fbdde872529c1071857a086e5ccef"
   integrity sha1-4j8/nE+Pvd6HJSnBBxhXoIblzO8=
 
+lodash.deburr@^4.1.0:
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/lodash.deburr/-/lodash.deburr-4.1.0.tgz#ddb1bbb3ef07458c0177ba07de14422cb033ff9b"
+  integrity sha1-3bG7s+8HRYwBd7oH3hRCLLAz/5s=
+
 lodash.merge@^4.6.2:
   version "4.6.2"
   resolved "https://registry.yarnpkg.com/lodash.merge/-/lodash.merge-4.6.2.tgz#558aa53b43b661e1925a0afdfa36a9a1085fe57a"
@@ -1858,6 +2309,11 @@
   dependencies:
     semver "^6.0.0"
 
+map-cache@^0.2.2:
+  version "0.2.2"
+  resolved "https://registry.yarnpkg.com/map-cache/-/map-cache-0.2.2.tgz#c32abd0bd6525d9b051645bb4f26ac5dc98a0dbf"
+  integrity sha1-wyq9C9ZSXZsFFkW7TyasXcmKDb8=
+
 map-obj@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/map-obj/-/map-obj-1.0.1.tgz#d933ceb9205d82bdcf4886f6742bdc2b4dea146d"
@@ -1868,6 +2324,13 @@
   resolved "https://registry.yarnpkg.com/map-obj/-/map-obj-4.2.1.tgz#e4ea399dbc979ae735c83c863dd31bdf364277b7"
   integrity sha512-+WA2/1sPmDj1dlvvJmB5G6JKfY9dpn7EVBUL06+y6PoljPkh+6V1QihwxNkbcGxCRjt2b0F9K0taiCuo7MbdFQ==
 
+map-visit@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/map-visit/-/map-visit-1.0.0.tgz#ecdca8f13144e660f1b5bd41f12f3479d98dfb8f"
+  integrity sha1-7Nyo8TFE5mDxtb1B8S80edmN+48=
+  dependencies:
+    object-visit "^1.0.0"
+
 meow@^9.0.0:
   version "9.0.0"
   resolved "https://registry.yarnpkg.com/meow/-/meow-9.0.0.tgz#cd9510bc5cac9dee7d03c73ee1f9ad959f4ea364"
@@ -1891,11 +2354,30 @@
   resolved "https://registry.yarnpkg.com/merge-stream/-/merge-stream-2.0.0.tgz#52823629a14dd00c9770fb6ad47dc6310f2c1f60"
   integrity sha512-abv/qOcuPfk3URPfDzmZU1LKmuw8kT+0nIHvKrKgFrwifol/doWcdA4ZqsWQ8ENrFKkd67Mfpo/LovbIUsbt3w==
 
-merge2@^1.3.0:
+merge2@^1.2.3, merge2@^1.3.0:
   version "1.4.1"
   resolved "https://registry.yarnpkg.com/merge2/-/merge2-1.4.1.tgz#4368892f885e907455a6fd7dc55c0c9d404990ae"
   integrity sha512-8q7VEgMJW4J8tcfVPy8g09NcQwZdbwFEqhe/WZkoIzjn/3TGDwtOCYtXGxA3O8tPzpczCCDgv+P2P5y00ZJOOg==
 
+micromatch@^3.1.10:
+  version "3.1.10"
+  resolved "https://registry.yarnpkg.com/micromatch/-/micromatch-3.1.10.tgz#70859bc95c9840952f359a068a3fc49f9ecfac23"
+  integrity sha512-MWikgl9n9M3w+bpsY3He8L+w9eF9338xRl8IAO5viDizwSzziFEyUzo2xrrloB64ADbTf8uA8vRqqttDTOmccg==
+  dependencies:
+    arr-diff "^4.0.0"
+    array-unique "^0.3.2"
+    braces "^2.3.1"
+    define-property "^2.0.2"
+    extend-shallow "^3.0.2"
+    extglob "^2.0.4"
+    fragment-cache "^0.2.1"
+    kind-of "^6.0.2"
+    nanomatch "^1.2.9"
+    object.pick "^1.3.0"
+    regex-not "^1.0.0"
+    snapdragon "^0.8.1"
+    to-regex "^3.0.2"
+
 micromatch@^4.0.4:
   version "4.0.4"
   resolved "https://registry.yarnpkg.com/micromatch/-/micromatch-4.0.4.tgz#896d519dfe9db25fce94ceb7a500919bf881ebf9"
@@ -1947,6 +2429,14 @@
   resolved "https://registry.yarnpkg.com/minimist/-/minimist-1.2.5.tgz#67d66014b66a6a8aaa0c083c5fd58df4e4e97602"
   integrity sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw==
 
+mixin-deep@^1.2.0:
+  version "1.3.2"
+  resolved "https://registry.yarnpkg.com/mixin-deep/-/mixin-deep-1.3.2.tgz#1120b43dc359a785dce65b55b82e257ccf479566"
+  integrity sha512-WRoDn//mXBiJ1H40rqa3vH0toePwSsGb45iInWlTySa+Uu4k3tYUSxa2v1KqAiLtvlrSzaExqS1gtk96A9zvEA==
+  dependencies:
+    for-in "^1.0.2"
+    is-extendable "^1.0.1"
+
 ms@2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/ms/-/ms-2.0.0.tgz#5608aeadfc00be6c2901df5f9861788de0d597c8"
@@ -1967,6 +2457,23 @@
   resolved "https://registry.yarnpkg.com/mute-stream/-/mute-stream-0.0.8.tgz#1630c42b2251ff81e2a283de96a5497ea92e5e0d"
   integrity sha512-nnbWWOkoWyUsTjKrhgD0dcz22mdkSnpYqbEjIm2nhwhuxlSkpywJmBo8h0ZqJdkp73mb90SssHkN4rsRaBAfAA==
 
+nanomatch@^1.2.9:
+  version "1.2.13"
+  resolved "https://registry.yarnpkg.com/nanomatch/-/nanomatch-1.2.13.tgz#b87a8aa4fc0de8fe6be88895b38983ff265bd119"
+  integrity sha512-fpoe2T0RbHwBTBUOftAfBPaDEi06ufaUai0mE6Yn1kacc3SnTErfb/h+X94VXzI64rKFHYImXSvdwGGCmwOqCA==
+  dependencies:
+    arr-diff "^4.0.0"
+    array-unique "^0.3.2"
+    define-property "^2.0.2"
+    extend-shallow "^3.0.2"
+    fragment-cache "^0.2.1"
+    is-windows "^1.0.2"
+    kind-of "^6.0.2"
+    object.pick "^1.3.0"
+    regex-not "^1.0.0"
+    snapdragon "^0.8.1"
+    to-regex "^3.0.1"
+
 natural-compare@^1.4.0:
   version "1.4.0"
   resolved "https://registry.yarnpkg.com/natural-compare/-/natural-compare-1.4.0.tgz#4abebfeed7541f2c27acfb29bdbbd15c8d5ba4f7"
@@ -2016,6 +2523,15 @@
   dependencies:
     boolbase "~1.0.0"
 
+object-copy@^0.1.0:
+  version "0.1.0"
+  resolved "https://registry.yarnpkg.com/object-copy/-/object-copy-0.1.0.tgz#7e7d858b781bd7c991a41ba975ed3812754e998c"
+  integrity sha1-fn2Fi3gb18mRpBupde04EnVOmYw=
+  dependencies:
+    copy-descriptor "^0.1.0"
+    define-property "^0.2.5"
+    kind-of "^3.0.3"
+
 object-inspect@^1.11.0, object-inspect@^1.9.0:
   version "1.11.0"
   resolved "https://registry.yarnpkg.com/object-inspect/-/object-inspect-1.11.0.tgz#9dceb146cedd4148a0d9e51ab88d34cf509922b1"
@@ -2026,6 +2542,13 @@
   resolved "https://registry.yarnpkg.com/object-keys/-/object-keys-1.1.1.tgz#1c47f272df277f3b1daf061677d9c82e2322c60e"
   integrity sha512-NuAESUOUMrlIXOfHKzD6bpPu3tYt3xvjNdRIQ+FeT0lNb4K8WR70CaDxhuNguS2XG+GjkyMwOzsN5ZktImfhLA==
 
+object-visit@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/object-visit/-/object-visit-1.0.1.tgz#f79c4493af0c5377b59fe39d395e41042dd045bb"
+  integrity sha1-95xEk68MU3e1n+OdOV5BBC3QRbs=
+  dependencies:
+    isobject "^3.0.0"
+
 object.assign@^4.1.2:
   version "4.1.2"
   resolved "https://registry.yarnpkg.com/object.assign/-/object.assign-4.1.2.tgz#0ed54a342eceb37b38ff76eb831a0e788cb63940"
@@ -2036,6 +2559,13 @@
     has-symbols "^1.0.1"
     object-keys "^1.1.1"
 
+object.pick@^1.3.0:
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/object.pick/-/object.pick-1.3.0.tgz#87a10ac4c1694bd2e1cbf53591a66141fb5dd747"
+  integrity sha1-h6EKxMFpS9Lhy/U1kaZhQftd10c=
+  dependencies:
+    isobject "^3.0.1"
+
 object.values@^1.1.4:
   version "1.1.4"
   resolved "https://registry.yarnpkg.com/object.values/-/object.values-1.1.4.tgz#0d273762833e816b693a637d30073e7051535b30"
@@ -2161,6 +2691,11 @@
   dependencies:
     parse5 "^6.0.1"
 
+parse5@5.1.0:
+  version "5.1.0"
+  resolved "https://registry.yarnpkg.com/parse5/-/parse5-5.1.0.tgz#c59341c9723f414c452975564c7c00a68d58acd2"
+  integrity sha512-fxNG2sQjHvlVAYmzBZS9YlDp6PTSSDwa98vkD4QgVDDCAo84z5X1t5XyJQ62ImdLXx5NdIIfihey6xpum9/gRQ==
+
 parse5@^3.0.1:
   version "3.0.3"
   resolved "https://registry.yarnpkg.com/parse5/-/parse5-3.0.3.tgz#042f792ffdd36851551cf4e9e066b3874ab45b5c"
@@ -2173,6 +2708,16 @@
   resolved "https://registry.yarnpkg.com/parse5/-/parse5-6.0.1.tgz#e1a1c085c569b3dc08321184f19a39cc27f7c30b"
   integrity sha512-Ofn/CTFzRGTTxwpNEs9PP93gXShHcTq255nzRYSKe8AkVpZY7e1fpmTfOyoIvjP5HG7Z2ZM7VS9PPhQGW2pOpw==
 
+pascalcase@^0.1.1:
+  version "0.1.1"
+  resolved "https://registry.yarnpkg.com/pascalcase/-/pascalcase-0.1.1.tgz#b363e55e8006ca6fe21784d2db22bd15d7917f14"
+  integrity sha1-s2PlXoAGym/iF4TS2yK9FdeRfxQ=
+
+path-dirname@^1.0.0:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/path-dirname/-/path-dirname-1.0.2.tgz#cc33d24d525e099a5388c0336c6e32b9160609e0"
+  integrity sha1-zDPSTVJeCZpTiMAzbG4yuRYGCeA=
+
 path-exists@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/path-exists/-/path-exists-3.0.0.tgz#ce0ebeaa5f78cb18925ea7d810d7b59b010fd515"
@@ -2234,6 +2779,11 @@
   dependencies:
     find-up "^2.1.0"
 
+posix-character-classes@^0.1.0:
+  version "0.1.1"
+  resolved "https://registry.yarnpkg.com/posix-character-classes/-/posix-character-classes-0.1.1.tgz#01eac0fe3b5af71a2a6c02feabb8c1fef7e00eab"
+  integrity sha1-AerA/jta9xoqbAL+q7jB/vfgDqs=
+
 prelude-ls@^1.2.1:
   version "1.2.1"
   resolved "https://registry.yarnpkg.com/prelude-ls/-/prelude-ls-1.2.1.tgz#debc6489d7a6e6b0e7611888cec880337d316396"
@@ -2378,6 +2928,19 @@
     indent-string "^4.0.0"
     strip-indent "^3.0.0"
 
+regenerator-runtime@^0.13.4:
+  version "0.13.9"
+  resolved "https://registry.yarnpkg.com/regenerator-runtime/-/regenerator-runtime-0.13.9.tgz#8925742a98ffd90814988d7566ad30ca3b263b52"
+  integrity sha512-p3VT+cOEgxFsRRA9X4lkI1E+k2/CtnKtU4gcxyaCUreilL/vqI6CdZ3wxVUx3UOUg+gnUOQQcRI7BmSI656MYA==
+
+regex-not@^1.0.0, regex-not@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/regex-not/-/regex-not-1.0.2.tgz#1f4ece27e00b0b65e0247a6810e6a85d83a5752c"
+  integrity sha512-J6SDjUgDxQj5NusnOtdFxDwN/+HWykR8GELwctJ7mdqhcyy1xEc4SRFHUXvxTp661YaVKAjfRLZ9cCqS6tn32A==
+  dependencies:
+    extend-shallow "^3.0.2"
+    safe-regex "^1.1.0"
+
 regexpp@^3.0.0, regexpp@^3.1.0:
   version "3.2.0"
   resolved "https://registry.yarnpkg.com/regexpp/-/regexpp-3.2.0.tgz#0425a2768d8f23bad70ca4b90461fa2f1213e1b2"
@@ -2402,11 +2965,31 @@
   dependencies:
     rc "^1.2.8"
 
+repeat-element@^1.1.2:
+  version "1.1.4"
+  resolved "https://registry.yarnpkg.com/repeat-element/-/repeat-element-1.1.4.tgz#be681520847ab58c7568ac75fbfad28ed42d39e9"
+  integrity sha512-LFiNfRcSu7KK3evMyYOuCzv3L10TW7yC1G2/+StMjK8Y6Vqd2MG7r/Qjw4ghtuCOjFvlnms/iMmLqpvW/ES/WQ==
+
+repeat-string@^1.6.1:
+  version "1.6.1"
+  resolved "https://registry.yarnpkg.com/repeat-string/-/repeat-string-1.6.1.tgz#8dcae470e1c88abc2d600fff4a776286da75e637"
+  integrity sha1-jcrkcOHIirwtYA//Sndihtp15jc=
+
+require-directory@^2.1.1:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/require-directory/-/require-directory-2.1.1.tgz#8c64ad5fd30dab1c976e2344ffe7f792a6a6df42"
+  integrity sha1-jGStX9MNqxyXbiNE/+f3kqam30I=
+
 require-from-string@^2.0.2:
   version "2.0.2"
   resolved "https://registry.yarnpkg.com/require-from-string/-/require-from-string-2.0.2.tgz#89a7fdd938261267318eafe14f9c32e598c36909"
   integrity sha512-Xf0nWe6RseziFMu+Ap9biiUbmplq6S9/p+7w7YXP/JBHhrUDDUhwa+vANyubuqfZWTveU//DYVGsDG7RKL/vEw==
 
+require-main-filename@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/require-main-filename/-/require-main-filename-2.0.0.tgz#d0b329ecc7cc0f61649f62215be69af54aa8989b"
+  integrity sha512-NKN5kMDylKuldxYLSUfrbo5Tuzh4hd+2E8NPPX02mZtn1VuREQToYe/ZdlJy+J3uCpfaiGF05e7B8W0iXbQHmg==
+
 requireindex@^1.2.0:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/requireindex/-/requireindex-1.2.0.tgz#3463cdb22ee151902635aa6c9535d4de9c2ef1ef"
@@ -2417,6 +3000,11 @@
   resolved "https://registry.yarnpkg.com/resolve-from/-/resolve-from-4.0.0.tgz#4abcd852ad32dd7baabfe9b40e00a36db5f392e6"
   integrity sha512-pb/MYmXstAkysRFx8piNI1tGFNQIFA3vkE3Gq4EuA1dF6gHp/+vgZqsCGJapvy8N3Q+4o7FwvquPJcnZ7RYy4g==
 
+resolve-url@^0.2.1:
+  version "0.2.1"
+  resolved "https://registry.yarnpkg.com/resolve-url/-/resolve-url-0.2.1.tgz#2c637fe77c893afd2a663fe21aa9080068e2052a"
+  integrity sha1-LGN/53yJOv0qZj/iGqkIAGjiBSo=
+
 resolve@^1.10.0, resolve@^1.10.1, resolve@^1.20.0:
   version "1.20.0"
   resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.20.0.tgz#629a013fb3f70755d6f0b7935cc1c2c5378b1975"
@@ -2440,6 +3028,11 @@
     onetime "^5.1.0"
     signal-exit "^3.0.2"
 
+ret@~0.1.10:
+  version "0.1.15"
+  resolved "https://registry.yarnpkg.com/ret/-/ret-0.1.15.tgz#b8a4825d5bdb1fc3f6f53c2bc33f81388681c7bc"
+  integrity sha512-TTlYpa+OL+vMMNG24xSlQGEJ3B/RzEfUlLct7b5G/ytav+wPrplCpVMFuwzXbkecJrb6IYo1iFb0S9v37754mg==
+
 reusify@^1.0.4:
   version "1.0.4"
   resolved "https://registry.yarnpkg.com/reusify/-/reusify-1.0.4.tgz#90da382b1e126efc02146e90845a88db12925d76"
@@ -2483,6 +3076,13 @@
   resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.2.1.tgz#1eaf9fa9bdb1fdd4ec75f58f9cdb4e6b7827eec6"
   integrity sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ==
 
+safe-regex@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/safe-regex/-/safe-regex-1.1.0.tgz#40a3669f3b077d1e943d44629e157dd48023bf2e"
+  integrity sha1-QKNmnzsHfR6UPURinhV91IAjvy4=
+  dependencies:
+    ret "~0.1.10"
+
 "safer-buffer@>= 2.1.2 < 3":
   version "2.1.2"
   resolved "https://registry.yarnpkg.com/safer-buffer/-/safer-buffer-2.1.2.tgz#44fa161b0187b9549dd84bb91802f9bd8385cd6a"
@@ -2517,6 +3117,21 @@
   dependencies:
     lru-cache "^6.0.0"
 
+set-blocking@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/set-blocking/-/set-blocking-2.0.0.tgz#045f9782d011ae9a6803ddd382b24392b3d890f7"
+  integrity sha1-BF+XgtARrppoA93TgrJDkrPYkPc=
+
+set-value@^2.0.0, set-value@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/set-value/-/set-value-2.0.1.tgz#a18d40530e6f07de4228c7defe4227af8cad005b"
+  integrity sha512-JxHc1weCN68wRY0fhCoXpyK55m/XPHafOmK4UWD7m2CI14GMcFypt4w/0+NV5f/ZMby2F6S2wwA7fgynh9gWSw==
+  dependencies:
+    extend-shallow "^2.0.1"
+    is-extendable "^0.1.1"
+    is-plain-object "^2.0.3"
+    split-string "^3.0.1"
+
 shebang-command@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/shebang-command/-/shebang-command-2.0.0.tgz#ccd0af4f8835fbdc265b82461aaf0c36663f34ea"
@@ -2557,6 +3172,47 @@
     astral-regex "^2.0.0"
     is-fullwidth-code-point "^3.0.0"
 
+snapdragon-node@^2.0.1:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/snapdragon-node/-/snapdragon-node-2.1.1.tgz#6c175f86ff14bdb0724563e8f3c1b021a286853b"
+  integrity sha512-O27l4xaMYt/RSQ5TR3vpWCAB5Kb/czIcqUFOM/C4fYcLnbZUc1PkjTAMjof2pBWaSTwOUd6qUHcFGVGj7aIwnw==
+  dependencies:
+    define-property "^1.0.0"
+    isobject "^3.0.0"
+    snapdragon-util "^3.0.1"
+
+snapdragon-util@^3.0.1:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/snapdragon-util/-/snapdragon-util-3.0.1.tgz#f956479486f2acd79700693f6f7b805e45ab56e2"
+  integrity sha512-mbKkMdQKsjX4BAL4bRYTj21edOf8cN7XHdYUJEe+Zn99hVEYcMvKPct1IqNe7+AZPirn8BCDOQBHQZknqmKlZQ==
+  dependencies:
+    kind-of "^3.2.0"
+
+snapdragon@^0.8.1:
+  version "0.8.2"
+  resolved "https://registry.yarnpkg.com/snapdragon/-/snapdragon-0.8.2.tgz#64922e7c565b0e14204ba1aa7d6964278d25182d"
+  integrity sha512-FtyOnWN/wCHTVXOMwvSv26d+ko5vWlIDD6zoUJ7LW8vh+ZBC8QdljveRP+crNrtBwioEUWy/4dMtbBjA4ioNlg==
+  dependencies:
+    base "^0.11.1"
+    debug "^2.2.0"
+    define-property "^0.2.5"
+    extend-shallow "^2.0.1"
+    map-cache "^0.2.2"
+    source-map "^0.5.6"
+    source-map-resolve "^0.5.0"
+    use "^3.1.0"
+
+source-map-resolve@^0.5.0:
+  version "0.5.3"
+  resolved "https://registry.yarnpkg.com/source-map-resolve/-/source-map-resolve-0.5.3.tgz#190866bece7553e1f8f267a2ee82c606b5509a1a"
+  integrity sha512-Htz+RnsXWk5+P2slx5Jh3Q66vhQj1Cllm0zvnaY98+NFx+Dv2CF/f5O/t8x+KaNdrdIAsruNzoh/KpialbqAnw==
+  dependencies:
+    atob "^2.1.2"
+    decode-uri-component "^0.2.0"
+    resolve-url "^0.2.1"
+    source-map-url "^0.4.0"
+    urix "^0.1.0"
+
 source-map-support@0.5.9:
   version "0.5.9"
   resolved "https://registry.yarnpkg.com/source-map-support/-/source-map-support-0.5.9.tgz#41bc953b2534267ea2d605bccfa7bfa3111ced5f"
@@ -2573,6 +3229,16 @@
     buffer-from "^1.0.0"
     source-map "^0.6.0"
 
+source-map-url@^0.4.0:
+  version "0.4.1"
+  resolved "https://registry.yarnpkg.com/source-map-url/-/source-map-url-0.4.1.tgz#0af66605a745a5a2f91cf1bbf8a7afbc283dec56"
+  integrity sha512-cPiFOTLUKvJFIg4SKVScy4ilPPW6rFgMgfuZJPNoDuMs3nC1HbMUycBoJw77xFIp6z1UJQJOfx6C9GMH80DiTw==
+
+source-map@^0.5.6:
+  version "0.5.7"
+  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.5.7.tgz#8a039d2d1021d22d1ea14c80d8ea468ba2ef3fcc"
+  integrity sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=
+
 source-map@^0.6.0:
   version "0.6.1"
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"
@@ -2609,11 +3275,26 @@
   resolved "https://registry.yarnpkg.com/spdx-license-ids/-/spdx-license-ids-3.0.10.tgz#0d9becccde7003d6c658d487dd48a32f0bf3014b"
   integrity sha512-oie3/+gKf7QtpitB0LYLETe+k8SifzsX4KixvpOsbI6S0kRiRQ5MKOio8eMSAKQ17N06+wdEOXRiId+zOxo0hA==
 
+split-string@^3.0.1, split-string@^3.0.2:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/split-string/-/split-string-3.1.0.tgz#7cb09dda3a86585705c64b39a6466038682e8fe2"
+  integrity sha512-NzNVhJDYpwceVVii8/Hu6DKfD2G+NrQHlS/V/qgv763EYudVwEcMQNxd2lh+0VrUByXN/oJkl5grOhYWvQUYiw==
+  dependencies:
+    extend-shallow "^3.0.0"
+
 sprintf-js@~1.0.2:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/sprintf-js/-/sprintf-js-1.0.3.tgz#04e6926f662895354f3dd015203633b857297e2c"
   integrity sha1-BOaSb2YolTVPPdAVIDYzuFcpfiw=
 
+static-extend@^0.1.1:
+  version "0.1.2"
+  resolved "https://registry.yarnpkg.com/static-extend/-/static-extend-0.1.2.tgz#60809c39cbff55337226fd5e0b520f341f1fb5c6"
+  integrity sha1-YICcOcv/VTNyJv1eC1IPNB8ftcY=
+  dependencies:
+    define-property "^0.2.5"
+    object-copy "^0.1.0"
+
 string-width@^3.0.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/string-width/-/string-width-3.1.0.tgz#22767be21b62af1081574306f69ac51b62203961"
@@ -2748,11 +3429,26 @@
   dependencies:
     os-tmpdir "~1.0.2"
 
+to-object-path@^0.3.0:
+  version "0.3.0"
+  resolved "https://registry.yarnpkg.com/to-object-path/-/to-object-path-0.3.0.tgz#297588b7b0e7e0ac08e04e672f85c1f4999e17af"
+  integrity sha1-KXWIt7Dn4KwI4E5nL4XB9JmeF68=
+  dependencies:
+    kind-of "^3.0.2"
+
 to-readable-stream@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/to-readable-stream/-/to-readable-stream-1.0.0.tgz#ce0aa0c2f3df6adf852efb404a783e77c0475771"
   integrity sha512-Iq25XBt6zD5npPhlLVXGFN3/gyR2/qODcKNNyTMd4vbm39HUaOiAM4PMq0eMVC/Tkxz+Zjdsc55g9yyz+Yq00Q==
 
+to-regex-range@^2.1.0:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/to-regex-range/-/to-regex-range-2.1.1.tgz#7c80c17b9dfebe599e27367e0d4dd5590141db38"
+  integrity sha1-fIDBe53+vlmeJzZ+DU3VWQFB2zg=
+  dependencies:
+    is-number "^3.0.0"
+    repeat-string "^1.6.1"
+
 to-regex-range@^5.0.1:
   version "5.0.1"
   resolved "https://registry.yarnpkg.com/to-regex-range/-/to-regex-range-5.0.1.tgz#1648c44aae7c8d988a326018ed72f5b4dd0392e4"
@@ -2760,11 +3456,33 @@
   dependencies:
     is-number "^7.0.0"
 
+to-regex@^3.0.1, to-regex@^3.0.2:
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/to-regex/-/to-regex-3.0.2.tgz#13cfdd9b336552f30b51f33a8ae1b42a7a7599ce"
+  integrity sha512-FWtleNAtZ/Ki2qtqej2CXTOayOH9bHDQF+Q48VpWyDXjbYxA4Yz8iDB31zXOBUlOHHKidDbqGVrTUvQMPmBGBw==
+  dependencies:
+    define-property "^2.0.2"
+    extend-shallow "^3.0.2"
+    regex-not "^1.0.2"
+    safe-regex "^1.1.0"
+
 trim-newlines@^3.0.0:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/trim-newlines/-/trim-newlines-3.0.1.tgz#260a5d962d8b752425b32f3a7db0dcacd176c144"
   integrity sha512-c1PTsA3tYrIsLGkJkzHF+w9F2EyxfXGo4UyJc4pFL++FMjnq0HJS69T3M7d//gKrFKwy429bouPescbjecU+Zw==
 
+ts-lit-plugin@^1.2.1:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/ts-lit-plugin/-/ts-lit-plugin-1.2.1.tgz#7fca17a454645c14911917fa7f17ade582fa3056"
+  integrity sha512-k/Me+aT1N9ckC/KuJCAlAJgCHFezOxuOGOzBE0q42xnKbJnUMNl08WqWF6C7OKecCPHIMRk5Wj5o6MDsmt9+qA==
+  dependencies:
+    lit-analyzer "1.2.1"
+
+ts-simple-type@~1.0.5:
+  version "1.0.7"
+  resolved "https://registry.yarnpkg.com/ts-simple-type/-/ts-simple-type-1.0.7.tgz#03930af557528dd40eaa121913c7035a0baaacf8"
+  integrity sha512-zKmsCQs4dZaeSKjEA7pLFDv7FHHqAFLPd0Mr//OIJvu8M+4p4bgSFJwZSEBEg3ec9W7RzRz1vi8giiX0+mheBQ==
+
 tsconfig-paths@^3.11.0:
   version "3.11.0"
   resolved "https://registry.yarnpkg.com/tsconfig-paths/-/tsconfig-paths-3.11.0.tgz#954c1fe973da6339c78e06b03ce2e48810b65f36"
@@ -2848,6 +3566,11 @@
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.3.2.tgz#399ab18aac45802d6f2498de5054fcbbe716a805"
   integrity sha512-zZ4hShnmnoVnAHpVHWpTcxdv7dWP60S2FsydQLV8V5PbS3FifjWFFRiHSWpDJahly88PRyV5teTSLoq4eG7mKw==
 
+typescript@^3.8.3:
+  version "3.9.10"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.9.10.tgz#70f3910ac7a51ed6bef79da7800690b19bf778b8"
+  integrity sha512-w6fIxVE/H1PkLKcCPsFqKE7Kv7QUwhU8qQY2MueZXWx5cPZdwFupLgKK3vntcK98BtNHZtAF4LA/yl2a7k8R6Q==
+
 unbox-primitive@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/unbox-primitive/-/unbox-primitive-1.0.1.tgz#085e215625ec3162574dc8859abee78a59b14471"
@@ -2858,6 +3581,16 @@
     has-symbols "^1.0.2"
     which-boxed-primitive "^1.0.2"
 
+union-value@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/union-value/-/union-value-1.0.1.tgz#0b6fe7b835aecda61c6ea4d4f02c14221e109847"
+  integrity sha512-tJfXmxMeWYnczCVs7XAEvIV7ieppALdyepWMkHkwciRpZraG/xwT+s2JN8+pr1+8jCRf80FFzvr+MpQeeoF4Xg==
+  dependencies:
+    arr-union "^3.1.0"
+    get-value "^2.0.6"
+    is-extendable "^0.1.1"
+    set-value "^2.0.1"
+
 unique-string@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/unique-string/-/unique-string-2.0.0.tgz#39c6451f81afb2749de2b233e3f7c5e8843bd89d"
@@ -2865,6 +3598,14 @@
   dependencies:
     crypto-random-string "^2.0.0"
 
+unset-value@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/unset-value/-/unset-value-1.0.0.tgz#8376873f7d2335179ffb1e6fc3a8ed0dfc8ab559"
+  integrity sha1-g3aHP30jNRef+x5vw6jtDfyKtVk=
+  dependencies:
+    has-value "^0.3.1"
+    isobject "^3.0.0"
+
 update-notifier@^5.0.0:
   version "5.1.0"
   resolved "https://registry.yarnpkg.com/update-notifier/-/update-notifier-5.1.0.tgz#4ab0d7c7f36a231dd7316cf7729313f0214d9ad9"
@@ -2892,6 +3633,11 @@
   dependencies:
     punycode "^2.1.0"
 
+urix@^0.1.0:
+  version "0.1.0"
+  resolved "https://registry.yarnpkg.com/urix/-/urix-0.1.0.tgz#da937f7a62e21fec1fd18d49b35c2935067a6c72"
+  integrity sha1-2pN/emLiH+wf0Y1Js1wpNQZ6bHI=
+
 url-parse-lax@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/url-parse-lax/-/url-parse-lax-3.0.0.tgz#16b5cafc07dbe3676c1b1999177823d6503acb0c"
@@ -2899,6 +3645,11 @@
   dependencies:
     prepend-http "^2.0.0"
 
+use@^3.1.0:
+  version "3.1.1"
+  resolved "https://registry.yarnpkg.com/use/-/use-3.1.1.tgz#d50c8cac79a19fbc20f2911f56eb973f4e10070f"
+  integrity sha512-cwESVXlO3url9YWlFW/TA9cshCEhtu7IKJ/p5soJ/gGpj7vbvFrAY/eIioQ6Dw23KjZhYgiIo8HOs1nQ2vr/oQ==
+
 util-deprecate@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/util-deprecate/-/util-deprecate-1.0.2.tgz#450d4dc9fa70de732762fbd2d4a28981419a0ccf"
@@ -2917,6 +3668,56 @@
     spdx-correct "^3.0.0"
     spdx-expression-parse "^3.0.0"
 
+vscode-css-languageservice@4.3.0:
+  version "4.3.0"
+  resolved "https://registry.yarnpkg.com/vscode-css-languageservice/-/vscode-css-languageservice-4.3.0.tgz#40c797d664ab6188cace33cfbb19b037580a9318"
+  integrity sha512-BkQAMz4oVHjr0oOAz5PdeE72txlLQK7NIwzmclfr+b6fj6I8POwB+VoXvrZLTbWt9hWRgfvgiQRkh5JwrjPJ5A==
+  dependencies:
+    vscode-languageserver-textdocument "^1.0.1"
+    vscode-languageserver-types "3.16.0-next.2"
+    vscode-nls "^4.1.2"
+    vscode-uri "^2.1.2"
+
+vscode-html-languageservice@3.1.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/vscode-html-languageservice/-/vscode-html-languageservice-3.1.0.tgz#265b53bda595e6947b16b0fb8c604e1e58685393"
+  integrity sha512-QAyRHI98bbEIBCqTzZVA0VblGU40na0txggongw5ZgTj9UVsVk5XbLT16O9OTcbqBGSqn0oWmFDNjK/XGIDcqg==
+  dependencies:
+    vscode-languageserver-textdocument "^1.0.1"
+    vscode-languageserver-types "3.16.0-next.2"
+    vscode-nls "^4.1.2"
+    vscode-uri "^2.1.2"
+
+vscode-languageserver-textdocument@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/vscode-languageserver-textdocument/-/vscode-languageserver-textdocument-1.0.1.tgz#178168e87efad6171b372add1dea34f53e5d330f"
+  integrity sha512-UIcJDjX7IFkck7cSkNNyzIz5FyvpQfY7sdzVy+wkKN/BLaD4DQ0ppXQrKePomCxTS7RrolK1I0pey0bG9eh8dA==
+
+vscode-languageserver-types@3.16.0-next.2:
+  version "3.16.0-next.2"
+  resolved "https://registry.yarnpkg.com/vscode-languageserver-types/-/vscode-languageserver-types-3.16.0-next.2.tgz#940bd15c992295a65eae8ab6b8568a1e8daa3083"
+  integrity sha512-QjXB7CKIfFzKbiCJC4OWC8xUncLsxo19FzGVp/ADFvvi87PlmBSCAtZI5xwGjF5qE0xkLf0jjKUn3DzmpDP52Q==
+
+vscode-nls@^4.1.2:
+  version "4.1.2"
+  resolved "https://registry.yarnpkg.com/vscode-nls/-/vscode-nls-4.1.2.tgz#ca8bf8bb82a0987b32801f9fddfdd2fb9fd3c167"
+  integrity sha512-7bOHxPsfyuCqmP+hZXscLhiHwe7CSuFE4hyhbs22xPIhQ4jv99FcR4eBzfYYVLP356HNFpdvz63FFb/xw6T4Iw==
+
+vscode-uri@^2.1.2:
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/vscode-uri/-/vscode-uri-2.1.2.tgz#c8d40de93eb57af31f3c715dd650e2ca2c096f1c"
+  integrity sha512-8TEXQxlldWAuIODdukIb+TR5s+9Ds40eSJrw+1iDDA9IFORPjMELarNQE3myz5XIkWWpdprmJjm1/SxMlWOC8A==
+
+web-component-analyzer@~1.1.1:
+  version "1.1.6"
+  resolved "https://registry.yarnpkg.com/web-component-analyzer/-/web-component-analyzer-1.1.6.tgz#d9bd904d904a711c19ba6046a45b60a7ee3ed2e9"
+  integrity sha512-1PyBkb/jijDEVE+Pnk3DTmVHD8takipdvAwvZv1V8jIidsSIJ5nhN87Gs+4dpEb1vw48yp8dnbZKkvMYJ+C0VQ==
+  dependencies:
+    fast-glob "^3.2.2"
+    ts-simple-type "~1.0.5"
+    typescript "^3.8.3"
+    yargs "^15.3.1"
+
 which-boxed-primitive@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/which-boxed-primitive/-/which-boxed-primitive-1.0.2.tgz#13757bc89b209b049fe5d86430e21cf40a89a8e6"
@@ -2928,6 +3729,11 @@
     is-string "^1.0.5"
     is-symbol "^1.0.3"
 
+which-module@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/which-module/-/which-module-2.0.0.tgz#d9ef07dce77b9902b8a3a8fa4b31c3e3f7e6e87a"
+  integrity sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho=
+
 which@^2.0.1:
   version "2.0.2"
   resolved "https://registry.yarnpkg.com/which/-/which-2.0.2.tgz#7c6a8dd0a636a0327e10b59c9286eee93f3f51b1"
@@ -2947,6 +3753,15 @@
   resolved "https://registry.yarnpkg.com/word-wrap/-/word-wrap-1.2.3.tgz#610636f6b1f703891bd34771ccb17fb93b47079c"
   integrity sha512-Hz/mrNwitNRh/HUAtM/VT/5VH+ygD6DV7mYKZAtHOrbs8U7lvPS6xf7EJKMF0uW1KJCl0H701g3ZGus+muE5vQ==
 
+wrap-ansi@^6.2.0:
+  version "6.2.0"
+  resolved "https://registry.yarnpkg.com/wrap-ansi/-/wrap-ansi-6.2.0.tgz#e9393ba07102e6c91a3b221478f0257cd2856e53"
+  integrity sha512-r6lPcBGxZXlIcymEu7InxDMhdW0KDxpLgoFLcguasxCaJ/SOIZwINatK9KY/tf+ZrlywOKU0UDj3ATXUBfxJXA==
+  dependencies:
+    ansi-styles "^4.0.0"
+    string-width "^4.1.0"
+    strip-ansi "^6.0.0"
+
 wrap-ansi@^7.0.0:
   version "7.0.0"
   resolved "https://registry.yarnpkg.com/wrap-ansi/-/wrap-ansi-7.0.0.tgz#67e145cff510a6a6984bdf1152911d69d2eb9e43"
@@ -2976,12 +3791,42 @@
   resolved "https://registry.yarnpkg.com/xdg-basedir/-/xdg-basedir-4.0.0.tgz#4bc8d9984403696225ef83a1573cbbcb4e79db13"
   integrity sha512-PSNhEJDejZYV7h50BohL09Er9VaIefr2LMAf3OEmpCkjOi34eYyQYAXUTjEQtZJTKcF0E2UKTh+osDLsgNim9Q==
 
+y18n@^4.0.0:
+  version "4.0.3"
+  resolved "https://registry.yarnpkg.com/y18n/-/y18n-4.0.3.tgz#b5f259c82cd6e336921efd7bfd8bf560de9eeedf"
+  integrity sha512-JKhqTOwSrqNA1NY5lSztJ1GrBiUodLMmIZuLiDaMRJ+itFd+ABVE8XBjOvIWL+rSqNDC74LCSFmlb/U4UZ4hJQ==
+
 yallist@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/yallist/-/yallist-4.0.0.tgz#9bb92790d9c0effec63be73519e11a35019a3a72"
   integrity sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A==
 
+yargs-parser@^18.1.2:
+  version "18.1.3"
+  resolved "https://registry.yarnpkg.com/yargs-parser/-/yargs-parser-18.1.3.tgz#be68c4975c6b2abf469236b0c870362fab09a7b0"
+  integrity sha512-o50j0JeToy/4K6OZcaQmW6lyXXKhq7csREXcDwk2omFPJEwUNOVtJKvmDr9EI1fAJZUyZcRF7kxGBWmRXudrCQ==
+  dependencies:
+    camelcase "^5.0.0"
+    decamelize "^1.2.0"
+
 yargs-parser@^20.2.3:
   version "20.2.9"
   resolved "https://registry.yarnpkg.com/yargs-parser/-/yargs-parser-20.2.9.tgz#2eb7dc3b0289718fc295f362753845c41a0c94ee"
   integrity sha512-y11nGElTIV+CT3Zv9t7VKl+Q3hTQoT9a1Qzezhhl6Rp21gJ/IVTW7Z3y9EWXhuUBC2Shnf+DX0antecpAwSP8w==
+
+yargs@^15.3.1:
+  version "15.4.1"
+  resolved "https://registry.yarnpkg.com/yargs/-/yargs-15.4.1.tgz#0d87a16de01aee9d8bec2bfbf74f67851730f4f8"
+  integrity sha512-aePbxDmcYW++PaqBsJ+HYUFwCdv4LVvdnhBy78E57PIor8/OVvhMrADFFEDh8DHDFRv/O9i3lPhsENjO7QX0+A==
+  dependencies:
+    cliui "^6.0.0"
+    decamelize "^1.2.0"
+    find-up "^4.1.0"
+    get-caller-file "^2.0.1"
+    require-directory "^2.1.1"
+    require-main-filename "^2.0.0"
+    set-blocking "^2.0.0"
+    string-width "^4.2.0"
+    which-module "^2.0.0"
+    y18n "^4.0.0"
+    yargs-parser "^18.1.2"