Add keyboard shortcuts to account dropdown

Change-Id: I5ce804f896522f4bf25f8a6ed70231ef27c85876
diff --git a/polygerrit-ui/app/elements/core/gr-account-dropdown/gr-account-dropdown.js b/polygerrit-ui/app/elements/core/gr-account-dropdown/gr-account-dropdown.js
index 903552a..23a4c55 100644
--- a/polygerrit-ui/app/elements/core/gr-account-dropdown/gr-account-dropdown.js
+++ b/polygerrit-ui/app/elements/core/gr-account-dropdown/gr-account-dropdown.js
@@ -90,7 +90,9 @@
       return undefined;
     }
 
-    const links = [{name: 'Settings', url: '/settings/'}];
+    const links = [];
+    links.push({name: 'Settings', url: '/settings/'});
+    links.push({name: 'Keyboard Shortcuts', id: 'shortcuts'});
     if (switchAccountUrl) {
       const replacements = {path};
       const url = this._interpolateUrl(switchAccountUrl, replacements);
@@ -107,6 +109,11 @@
     ];
   }
 
+  _handleShortcutsTap(e) {
+    this.dispatchEvent(new CustomEvent('show-keyboard-shortcuts',
+        {bubbles: true, composed: true}));
+  }
+
   _handleLocationChange() {
     this._path =
         window.location.pathname +
diff --git a/polygerrit-ui/app/elements/core/gr-account-dropdown/gr-account-dropdown_html.js b/polygerrit-ui/app/elements/core/gr-account-dropdown/gr-account-dropdown_html.js
index b47894e..5db7923 100644
--- a/polygerrit-ui/app/elements/core/gr-account-dropdown/gr-account-dropdown_html.js
+++ b/polygerrit-ui/app/elements/core/gr-account-dropdown/gr-account-dropdown_html.js
@@ -37,6 +37,7 @@
     link=""
     items="[[links]]"
     top-content="[[topContent]]"
+    on-tap-item-shortcuts="_handleShortcutsTap"
     horizontal-align="right"
   >
     <span hidden$="[[_hasAvatars]]" hidden="">[[_accountName(account)]]</span>
diff --git a/polygerrit-ui/app/elements/core/gr-account-dropdown/gr-account-dropdown_test.html b/polygerrit-ui/app/elements/core/gr-account-dropdown/gr-account-dropdown_test.html
index 6c8ed68..a366d09 100644
--- a/polygerrit-ui/app/elements/core/gr-account-dropdown/gr-account-dropdown_test.html
+++ b/polygerrit-ui/app/elements/core/gr-account-dropdown/gr-account-dropdown_test.html
@@ -84,12 +84,12 @@
     assert.isUndefined(element._getLinks(null));
 
     // No switch account link.
-    assert.equal(element._getLinks(null, '').length, 2);
+    assert.equal(element._getLinks(null, '').length, 3);
 
     // Unparameterized switch account link.
     let links = element._getLinks('/switch-account', '');
-    assert.equal(links.length, 3);
-    assert.deepEqual(links[1], {
+    assert.equal(links.length, 4);
+    assert.deepEqual(links[2], {
       name: 'Switch account',
       url: '/switch-account',
       external: true,
@@ -97,8 +97,8 @@
 
     // Parameterized switch account link.
     links = element._getLinks('/switch-account${path}', '/c/123');
-    assert.equal(links.length, 3);
-    assert.deepEqual(links[1], {
+    assert.equal(links.length, 4);
+    assert.deepEqual(links[2], {
       name: 'Switch account',
       url: '/switch-account/c/123',
       external: true,
diff --git a/polygerrit-ui/app/elements/gr-app-element.js b/polygerrit-ui/app/elements/gr-app-element.js
index ecb40a5..4915eda 100644
--- a/polygerrit-ui/app/elements/gr-app-element.js
+++ b/polygerrit-ui/app/elements/gr-app-element.js
@@ -499,6 +499,10 @@
     }
   }
 
+  handleShowKeyboardShortcuts() {
+    this.$.keyboardShortcuts.open();
+  }
+
   _showKeyboardShortcuts(e) {
     // same shortcut should close the dialog if pressed again
     // when dialog is open
diff --git a/polygerrit-ui/app/elements/gr-app-element_html.js b/polygerrit-ui/app/elements/gr-app-element_html.js
index 47139ce..75295bc 100644
--- a/polygerrit-ui/app/elements/gr-app-element_html.js
+++ b/polygerrit-ui/app/elements/gr-app-element_html.js
@@ -104,6 +104,7 @@
       id="mainHeader"
       search-query="{{params.query}}"
       on-mobile-search="_mobileSearchToggle"
+      on-show-keyboard-shortcuts="handleShowKeyboardShortcuts"
       login-url="[[_loginUrl]]"
     >
     </gr-main-header>
diff --git a/polygerrit-ui/app/elements/shared/gr-dropdown/gr-dropdown.js b/polygerrit-ui/app/elements/shared/gr-dropdown/gr-dropdown.js
index 8e7ea87..717275d 100644
--- a/polygerrit-ui/app/elements/shared/gr-dropdown/gr-dropdown.js
+++ b/polygerrit-ui/app/elements/shared/gr-dropdown/gr-dropdown.js
@@ -292,7 +292,8 @@
     const item = this.items.find(item => item.id === id);
     if (id && !this.disabledIds.includes(id)) {
       if (item) {
-        this.dispatchEvent(new CustomEvent('tap-item', {detail: item}));
+        this.dispatchEvent(new CustomEvent('tap-item',
+            {detail: item, bubbles: true, composed: true}));
       }
       this.dispatchEvent(new CustomEvent('tap-item-' + id));
     }