API REVIEW request for RT-19709: API to enable accelerators lazily.

[Richard Bair]

> Adding a onMenuValidation API that would be called automatically at the same time that onShowing handler
> is called and when an accelerator is triggered.
> /**
> * <p>Called when a accelerator for the Menuitem is invoked</p>
> */
>    public static final EventType<Event> MENUVALIDATION_EVENT = new EventType<Event>();
> private ObjectProperty<EventHandler<Event>> onMenuValidation;

Should it be MENU_VALIDATION_EVENT?

Otherwise looked OK to me.

Richard