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/ExternalActionManager.java
* @param listener
		 *            The listener to be added; must not be <code>null</code>.
		 */
		public void addPropertyChangeListener(String identifier,
				IPropertyChangeListener listener);
		/**
		 * An accessor for the accelerator associated with the item indicated by
		 * the identifier. This identifier is specific to mechanism being used.
		 * In the case of the Eclipse workbench, this is the command identifier.
		 * 
		 * @param identifier
		 *            The identifier of the item from which the accelerator
		 *            should be obtained ; must not be <code>null</code>.
		 * @return An integer representation of the accelerator. This is the
		 *         same accelerator format used by SWT.
		 */
		public Integer getAccelerator(String identifier);
		/**
		 * An accessor for the accelerator text associated with the item
		 * indicated by the identifier. This identifier is specific to mechanism
		 * being used. In the case of the Eclipse workbench, this is the command
		 * identifier.
		 * 
		 * @param identifier
		 *            The identifier of the item from which the accelerator text
		 *            should be obtained ; must not be <code>null</code>.
		 * @return A string representation of the accelerator. This is the
		 *         string representation that should be displayed to the user.
		 */
		public String getAcceleratorText(String identifier);