Correct branch for PR?

[Robert Lichtenberger]

I have a testcase + fix ready for JDK-8237372 (A null pointer exception in
TabPaneSkin if only a mouse release event is sent to the skin).

To avoid the kind of confusion I created with my last pull request ;-)
* For what branch should I create the pull request? (From my point of view
jfx14 is preferable, since this is a real bug affecting our software)
* Will pull requests for jfx14 (like my last one) be automatically pushed
forward to the master branch?

Best regards,
Robert