This pull request fixes the sceneProperty listener in `MenuBarSkin` so that we leave the current system menubar alone when other menubars are changed.
It also adds a test case that reproduces the problem before the fix. ------------- Commits: - 7910ab27: Don't always remove system menubar Changes: https://git.openjdk.java.net/jfx/pull/86/files Webrev: https://webrevs.openjdk.java.net/jfx/86/webrev.00 Issue: https://bugs.openjdk.java.net/browse/JDK-8236839 Stats: 33 lines in 2 files changed: 32 ins; 0 del; 1 mod Patch: https://git.openjdk.java.net/jfx/pull/86.diff Fetch: git fetch https://git.openjdk.java.net/jfx pull/86/head:pull/86 PR: https://git.openjdk.java.net/jfx/pull/86
