Bug 110998 [Problems] Remove the working set selection and switch to using global working sets
M2 We need to remove the working sets option in the filter and switch to using the current list of working sets. We should move this to a preference that says only "Use Working Sets"
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);
	}
	/**