Bug 309837 [Workbench] Improve startup performance by fixing the cache for feature ini's
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/WorkbenchActionBuilder.java
* Adds the keyboard navigation submenu to the specified menu.
     */
    private void addKeyboardShortcuts(MenuManager menu) {
        MenuManager subMenu = new MenuManager(IDEWorkbenchMessages.Workbench_shortcuts, "shortcuts"); 
        menu.add(subMenu);
        subMenu.add(showPartPaneMenuAction);
        subMenu.add(showViewMenuAction);
        subMenu.add(quickAccessAction);
        subMenu.add(new Separator());
        subMenu.add(maximizePartAction);
        subMenu.add(minimizePartAction);
        subMenu.add(new Separator());
        subMenu.add(activateEditorAction);
        subMenu.add(nextEditorAction);
        subMenu.add(prevEditorAction);
        subMenu.add(switchToEditorAction);
        subMenu.add(new Separator());
        subMenu.add(nextPartAction);
        subMenu.add(prevPartAction);
        subMenu.add(new Separator());
        subMenu.add(nextPerspectiveAction);
        subMenu.add(prevPerspectiveAction);
    }
    /**
	 * Creates and returns the Help menu.
	 */
	private MenuManager createHelpMenu() {
		MenuManager menu = new MenuManager(IDEWorkbenchMessages.Workbench_help, IWorkbenchActionConstants.M_HELP);
		addSeparatorOrGroupMarker(menu, "group.intro");