[Rev 02] RFR: 8241455: Memory leak on replacing selection/focusModel

[Jeanette Winzenburg]

> Several controls with selection/focusModels leave memory leaks on replacing the model.
> 
> Added tests for all such, those for the misbehaving models fail before and pass after the fix.
> 
> for convenience, the bug reference https://bugs.openjdk.java.net/browse/JDK-8241455

Jeanette Winzenburg has updated the pull request incrementally with one additional commit since the last revision:

  cleanup test as suggested in review

-------------

Changes:
  - all: https://git.openjdk.java.net/jfx/pull/148/files
  - new: https://git.openjdk.java.net/jfx/pull/148/files/d2918fb5..8bed244f

Webrevs:
 - full: https://webrevs.openjdk.java.net/jfx/148/webrev.02
 - incr: https://webrevs.openjdk.java.net/jfx/148/webrev.01-02

  Stats: 5 lines in 1 file changed: 0 ins; 1 del; 4 mod
  Patch: https://git.openjdk.java.net/jfx/pull/148.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/148/head:pull/148

PR: https://git.openjdk.java.net/jfx/pull/148