Fixes a memory leak of the chat window which may also cause disappearing ot some plugins from the toolbar.

src/net/java/sip/communicator/impl/gui/main/chat/menus/MessageWindowMenuBar.java

@@ -116,6 +116,7 @@ public void dispose()
     {
         pluginContainer.dispose();
         helpMenu.dispose();
+        optionsMenu.dispose();
     }
 
     /**

src/net/java/sip/communicator/impl/gui/main/menus/ToolsMenu.java

@@ -507,6 +507,24 @@ public void run()
         initVideoBridgeMenuWorker.start();
     }
 
+    /**
+     * Runs clean-up for associated resources which need explicit disposal (e.g.
+     * listeners keeping this instance alive because they were added to the
+     * model which operationally outlives this instance).
+     */
+    public void dispose()
+    {
+        GuiActivator.bundleContext.removeServiceListener(this);
+
+        GuiActivator.getUIService().removePluginComponentListener(this);
+
+        /*
+         * Let go of all Components contributed by PluginComponents because the
+         * latter will still live in the contribution store.
+         */
+        removeAll();
+    }
+
     /**
      * Initializes the video bridge menu on Mac OSX.
      */