Bug 317702 ToolItemRenderer needs to consider menus for dropdown tool items
The instantiated ToolItem does have the correct SWT.DROP_DOWN style but clicking on it does nothing.
bundles/org.eclipse.e4.ui.workbench.renderers.swt/src/org/eclipse/e4/ui/workbench/renderers/swt/ToolItemRenderer.java
if (toolItem == null)
				return;
			String attName = (String) event
					.getProperty(UIEvents.EventTags.ATTNAME);
			if (UIEvents.UILabel.LABEL.equals(attName)) {
				setItemText(itemModel, toolItem);
			} else if (UIEvents.UILabel.ICONURI.equals(attName)) {
				toolItem.setImage(getImage(itemModel));
			} else if (UIEvents.UILabel.TOOLTIP.equals(attName)) {
				toolItem.setToolTipText(getToolTipText(itemModel));
				toolItem.setImage(getImage(itemModel));
			}
		}
	};
	private EventHandler selectionUpdater = new EventHandler() {
		public void handleEvent(Event event) {
			
			if (!(event.getProperty(UIEvents.EventTags.ELEMENT) instanceof MToolItem))
				return;
			MToolItem itemModel = (MToolItem) event
					.getProperty(UIEvents.EventTags.ELEMENT);
			ToolItem toolItem = (ToolItem) itemModel.getWidget();
			if (toolItem != null) {
				toolItem.setSelection(itemModel.isSelected());
			}
		}
	};
	private EventHandler enabledUpdater = new EventHandler() {
		public void handleEvent(Event event) {