RFR: 8273485: Deadlock when also using Swing and exiting Fullscreen on Mac [v2]

[Florian Kirmaier]

> When using Swing it's possible to generate a Deadlock.
>  It's related to the nested eventloop started in enterFullScreenExitingLoop - and the RenderLock aquired when using setView in Scene.
>  Sample Programm and Threaddump are added to the ticket.
> 
> Removing the nested loop fixes the Problem. 
> I hope this doesn't have any side effect - so far i don't know of any.

Florian Kirmaier has updated the pull request incrementally with one additional commit since the last revision:

  JDK-8273485
  Added unit-test

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Changes:
  - all: https://git.openjdk.java.net/jfx/pull/622/files
  - new: https://git.openjdk.java.net/jfx/pull/622/files/bbe006d6..f302d180

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jfx&pr=622&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jfx&pr=622&range=00-01

  Stats: 66 lines in 1 file changed: 66 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jfx/pull/622.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/622/head:pull/622

PR: https://git.openjdk.java.net/jfx/pull/622