Bug 316298 [Compatibility] Support o.e.ui.menus visibleWhen
We need support in MCoreExpression for entire expressions created by the WorkbenchMenuService. They don't often use ReferenceExpressions to core expression definitions. PW
bundles/org.eclipse.e4.ui.workbench.swt/src/org/eclipse/e4/ui/workbench/swt/modeling/MenuServiceFilter.java
public static boolean DEBUG = false;
	private static void trace(String msg, Widget menu, MMenu menuModel) {
		System.err.println(msg + ": " + menu + ": " + menuModel);
	}
	private static Method aboutToShow;
	public static Method getAboutToShow() {
		if (aboutToShow == null) {
			try {
				aboutToShow = MenuManager.class
						.getDeclaredMethod("handleAboutToShow");
				aboutToShow.setAccessible(true);
			} catch (SecurityException e) {
				
				e.printStackTrace();
			} catch (NoSuchMethodException e) {
				
				e.printStackTrace();
			}
		}
		return aboutToShow;
	}
	@Inject
	private MApplication application;
	@Inject
	private IPresentationEngine renderer;
	@Inject
	EModelService modelService;
	private HashMap<Menu, Runnable> pendingCleanup = new HashMap<Menu, Runnable>();
	public void handleEvent(Event event) {
		if (!(event.widget instanceof Menu)) {