Migrate the "Xbus Messages" debug menu item

static/src/js/debug_manager_xbus.js

@@ -19,7 +19,7 @@
 /* Add an "Xbus messages" link to open related messages from the debug menu.
  *
  * Base Odoo code:
- * - addons/web/static/src/js/widgets/debug_manager.js
+ * - addons/web/static/src/js/tools/debug_manager_backend.js
  */
 
 odoo.define('xbus_emitter.debug_manager_xbus', function(require) {
@@ -32,12 +32,7 @@
         /* Add an "Xbus messages" link to open related messages from the debug menu. */
         open_xbus_messages: function() {
 
-            var view = this._active_view;
-            if (view === undefined) {
-                return;
-            }
-
-            var controller = view.controller;
+            var controller = this._controller;
             if (controller === undefined) {
                 return;
             }

static/src/xml/debug_manager.xml

@@ -2,7 +2,8 @@
 <templates xml:space="preserve">
 
     <!-- Add an "Xbus messages" link for single records
-        ("Get metadata" only gets shown for single records). -->
+        ("Get metadata" only gets shown for single records).
+        Base view ref: addons/web/static/src/xml/debug.xml. -->
 
     <t t-extend="WebClient.DebugManager.View">
         <t t-jquery="a[data-action='get_metadata']:parent" t-operation="after">
@@ -6,7 +7,7 @@
 
     <t t-extend="WebClient.DebugManager.View">
         <t t-jquery="a[data-action='get_metadata']:parent" t-operation="after">
-        <li><a href="#" data-action="open_xbus_messages">Xbus Messages</a></li>
+            <a role="menuitem" href="#" data-action="open_xbus_messages" class="dropdown-item">Xbus Messages</a>
         </t>
     </t>