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
ContextInjectionFactory.invoke(contrib.getObject(),
							Execute.class, lclContext);
					lclContext.remove(MItem.class.getName());
				}
				public void widgetDefaultSelected(SelectionEvent e) {
				}
			});
		} else if (me instanceof MHandledItem) {
			final MHandledItem item = (MHandledItem) me;
			final IEclipseContext lclContext = getContext(me);
			ToolItem ti = (ToolItem) me.getWidget();
			ti.addSelectionListener(new SelectionListener() {
				public void widgetSelected(SelectionEvent e) {
					EHandlerService service = (EHandlerService) lclContext
							.get(EHandlerService.class.getName());
					ParameterizedCommand cmd = item.getWbCommand();
					if (cmd == null) {
						cmd = generateParameterizedCommand(item, lclContext);
					}
					lclContext.set(MItem.class.getName(), item);
					service.executeHandler(cmd);
					lclContext.remove(MItem.class.getName());
				}
				public void widgetDefaultSelected(SelectionEvent e) {
				}
			});
		}
	}
}