Bug 67811 Need support for adding separators to the help menu
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/WorkbenchActionBuilder.java
subMenu.add(nextEditorAction);
        subMenu.add(prevEditorAction);
        subMenu.add(workbookEditorsAction);
        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
                .getString("Workbench.help"), IWorkbenchActionConstants.M_HELP); 
        
        if (introAction != null)
            menu.add(introAction);
        else if (quickStartAction != null)
            menu.add(quickStartAction);
        menu.add(helpContentsAction);
        
        if (tipsAndTricksAction != null)
            menu.add(tipsAndTricksAction);
        menu.add(new GroupMarker(IWorkbenchActionConstants.HELP_START));
        menu.add(new GroupMarker(IWorkbenchActionConstants.HELP_END));
        menu.add(new GroupMarker(IWorkbenchActionConstants.MB_ADDITIONS));
        				
        menu.add(new Separator());