Bug 204458 [Commands] Allow menu and toolbars to fire execution events
Keybindings will currently fire execution events when executing actions from the action framework. i.e. IActions with their actionDefinitionId set and IActionDelegates with the definitionId attribute in their action contributions. But it would be nice if selecting the menu or tool item would also fire the equivalent events. PW
bundles/org.eclipse.jface/src/org/eclipse/jface/action/ActionContributionItem.java
* Returns the listener for SWT menu item widget events.
	 * 
	 * @return a listener for menu item events
	 */
	private Listener getMenuItemListener() {
		if (menuItemListener == null) {
			menuItemListener = new Listener() {
				public void handleEvent(Event event) {
					switch (event.type) {
					case SWT.Dispose:
						handleWidgetDispose(event);
						break;
					case SWT.Selection:
						Widget ew = event.widget;
						if (ew != null) {
							handleWidgetSelection(event, ((MenuItem) ew)
									.getSelection());
						}
						break;
					}
				}
			};
		}
		return menuItemListener;
	}
	/**
	 * Returns the presentation mode, which is the bitwise-or of the
	 * <code>MODE_*</code> constants. The default mode setting is 0, meaning
	 * that for menu items, both text and image are shown (if present), but for
	 * tool items, the text is shown only if there is no image.