[8] Request for review: JDK-8024839 [Unified Swing/Fx threading] don't schedule an event dispatching from the event dispatch thread

[Anton V. Tarasov]

Hello,

Please, review the fix:
jira: https://jbs.oracle.com/bugs/browse/JDK-8024839
webrev: http://cr.openjdk.java.net/~ant/JDK-8024839/webrev.0

In unified Swing/Fx thread mode, an event should be dispatched straight 
away when the current thread is reported to be the dispatch thread.

Otherwise, a "sent event" (like the one produced by 
DefaultKeyboardFocusManager.sendMessage) will be a "posted event" which 
breaks the functionality.

Thanks,
Anton.