The OS crashes if the contentView of a window is set to nil while handling processKeyEquivalent. With this PR we just set the contentView to a basic do-nothing NSView for the interim.
------------- Commit messages: - Prevent OS crash when contentView is set to nil while processing shortcut Changes: https://git.openjdk.java.net/jfx/pull/714/files Webrev: https://webrevs.openjdk.java.net/?repo=jfx&pr=714&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8242544 Stats: 3 lines in 1 file changed: 2 ins; 0 del; 1 mod Patch: https://git.openjdk.java.net/jfx/pull/714.diff Fetch: git fetch https://git.openjdk.java.net/jfx pull/714/head:pull/714 PR: https://git.openjdk.java.net/jfx/pull/714
