Update 2.16.19 release notes

Change-Id: Idf62b5ef2ffa3ec8a2b6b5e24e1b67c799748b3f
diff --git a/pages/site/releases/2.16.md b/pages/site/releases/2.16.md
index 6fad45a..103df2e 100644
--- a/pages/site/releases/2.16.md
+++ b/pages/site/releases/2.16.md
@@ -637,6 +637,8 @@
     This helps to speedup online migration at the expense of imposing a
     higher load on the Gerrit server running at the same time.
 
+  * Add support for Elasticsearch 7.7.
+
 * Bug Fixes
 
   * [Issue 12637](https://bugs.chromium.org/p/gerrit/issues/detail?id=12637):
@@ -652,6 +654,11 @@
     If a group name was used in the `visibleto` predicate, changes were
     not returned even if the group had permission to see them.
 
+  * [Issue 12747](https://bugs.chromium.org/p/gerrit/issues/detail?id=12747):
+  Fix change query visibility for internal user.
+
+  * Fix internal server error on parsing commit message during receive commits.
+
   * [Issue 12646](https://bugs.chromium.org/p/gerrit/issues/detail?id=12646):
   Fix incorrect highlighting of diffs in the GWT UI.
 
@@ -686,6 +693,17 @@
   * [Issue 12673](https://bugs.chromium.org/p/gerrit/issues/detail?id=12673):
   Fix emitting debug logs while running tests.
 
+* PolyGerrit UI Fixes
+
+  * [Issue 12707](https://bugs.chromium.org/p/gerrit/issues/detail?id=12707):
+  Apply diff preferences immediately after pressing "Save".
+
+  * [Issue 12690](https://bugs.chromium.org/p/gerrit/issues/detail?id=12690):
+  Only show the "Edit" button for open changes in the diff view.
+
+  * [Issue 12726](https://bugs.chromium.org/p/gerrit/issues/detail?id=12726):
+  Fix incorrect highlighting after `/` character in Javascript.
+
 * Replication Plugin Fixes
 
   * [Issue 12678](https://bugs.chromium.org/p/gerrit/issues/detail?id=12678):
@@ -696,7 +714,16 @@
     back to slf4j logging for the replication log.
 
   * [Issue 12719](https://bugs.chromium.org/p/gerrit/issues/detail?id=12719):
-  Fix `start --wait` to track in-flight collisions and to not fail.
+  Fix `replication start --wait` to track in-flight collisions and to not fail.
+
+  * [Issue 12731](https://bugs.chromium.org/p/gerrit/issues/detail?id=12731):
+  Don't lose state when there's a pending push to the same ref.
+
+    If there was already a pending push (not an in-flight push) to the same endpoint,
+    the start for the push would be dropped when adding the push to the Destination.
+    This meant that a `replication start --wait` command would never complete when
+    one of its pushes was pending since its state would never receive the completion
+    notification for that push.
 
   * Fix URL matching to match real URLs in addition to templated URLs.
 
@@ -704,10 +731,14 @@
 
   * Improve logging of push failures caused by a lock failure on the remote.
 
+  * Improve logging of refs to be pushed.
+
 * Library Upgrades
 
   * Upgrade jackson-core to 2.11.0
 
+  * Upgrade jetty to 9.4.27.v20200227
+
 ### 2.16.18
 
 * Breaking Changes