Bug 114542 [Markers] Possible to get empty path nodes in problems view hierarcahl mode
20051101 Warnings on the top level of a project ended up having an empty label. STEPS 1) Change filters to show selected elements and children 2) Go into hierarchal mode 3) Select org.eclipse.ui.tests
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/internal/MarkerView.java
* @see org.eclipse.ui.views.markers.internal.TableView#addDropDownContributions(org.eclipse.jface.action.IMenuManager)
	 */
	void addDropDownContributions(IMenuManager menu) {
		super.addDropDownContributions(menu);
		menu.add(new Separator(MENU_FILTERS_GROUP));
		
		filtersMenu = new MenuManager(MarkerMessages.filtersSubMenu_title);
		refreshFilterMenu();
		menu.appendToGroup(MENU_FILTERS_GROUP, filtersMenu);
	}
	/**
	 * Create the show in menu if there is a single selection.
	 * 
	 * @param menu
	 */
	void createShowInMenu(IMenuManager menu) {
		ISelection selection = getViewer().getSelection();
		if (!(selection instanceof IStructuredSelection))
			return;
		IStructuredSelection structured = (IStructuredSelection) selection;
		if(!Util.isSingleConcreteSelection(structured))
			return;
		menu.add(new Separator(MENU_SHOW_IN_GROUP));
		
		showInMenu = new MenuManager(IDEWorkbenchMessages.Workbench_showIn);
		showInMenu.add(ContributionItemFactory.VIEWS_SHOW_IN
				.create(getViewSite().getWorkbenchWindow()));
		menu.appendToGroup(MENU_SHOW_IN_GROUP, showInMenu);
	}
	/**