Bug 157805 [Workbench] Add Hide Toolbars to the Window menu
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/WorkbenchActionBuilder.java
menu.add(new GroupMarker(IWorkbenchActionConstants.HELP_START));
		menu.add(new GroupMarker("group.main.ext")); 
		addSeparatorOrGroupMarker(menu, "group.tutorials"); 
		addSeparatorOrGroupMarker(menu, "group.tools"); 
		addSeparatorOrGroupMarker(menu, "group.updates"); 
		menu.add(new GroupMarker(IWorkbenchActionConstants.HELP_END));
		addSeparatorOrGroupMarker(menu, IWorkbenchActionConstants.MB_ADDITIONS);
		
		menu.add(new Separator("group.about")); 
		
		ActionContributionItem aboutItem = new ActionContributionItem(aboutAction);
		aboutItem.setVisible(!"carbon".equals(SWT.getPlatform())); 
        menu.add(aboutItem);
		menu.add(new GroupMarker("group.about.ext")); 
        /*		
         final IMutableContextActivationService contextActivationServiceA = ContextActivationServiceFactory.getMutableContextActivationService();
         contextActivationServiceA.setActiveContextIds(new HashSet(Collections.singletonList("A")));
         final IMutableContextActivationService contextActivationServiceB = ContextActivationServiceFactory.getMutableContextActivationService();
         contextActivationServiceB.setActiveContextIds(new HashSet(Collections.singletonList("B")));				
         
         menu.add(new Separator());
         
         menu.add(new Action("Add context A to the workbench") {
         public void run() {
         IWorkbench workbench = PlatformUI.getWorkbench();
         IWorkbenchContextSupport workbenchContextSupport = (IWorkbenchContextSupport) workbench.getContextSupport();
         workbenchContextSupport.getCompoundContextActivationService().addContextActivationService(contextActivationServiceA);
         }
         });
         menu.add(new Action("Remove context A from the workbench") {