Bug 325722 'Close'-related context menu actions should show up for all stacks and apply to all items
See bug title ;)
bundles/org.eclipse.e4.ui.workbench.renderers.swt/src/org/eclipse/e4/ui/workbench/renderers/swt/StackRenderer.java
if (activationJob == null) {
			activationJob = new ActivationJob();
			activationJob.stackToActivate = stack;
			ctf.getDisplay().asyncExec(activationJob);
		} else {
			activationJob.stackToActivate = stack;
		}
	}
	public StackRenderer() {
		super();
	}
	@PostConstruct
	public void init() {
		super.init(eventBroker);
		itemUpdater = new EventHandler() {
			public void handleEvent(Event event) {
				MUIElement element = (MUIElement) event
						.getProperty(UIEvents.EventTags.ELEMENT);
				if (!(element instanceof MPart))
					return;
				MPart part = (MPart) element;
				String attName = (String) event
						.getProperty(UIEvents.EventTags.ATTNAME);
				Object newValue = event
						.getProperty(UIEvents.EventTags.NEW_VALUE);
				
				if (element.getParent() != null
						&& element.getParent().getRenderer() == StackRenderer.this) {
					CTabItem cti = findItemForPart(element, element.getParent());
					if (cti != null) {