A straightforward fix to just include MouseButton.NONE in the click counter map in cases weird mouse button events are sent
------------- Commit messages: - Remove excessive comment - Fix possible NPE Changes: https://git.openjdk.org/jfx/pull/2034/files Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=2034&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8375070 Stats: 3 lines in 1 file changed: 0 ins; 2 del; 1 mod Patch: https://git.openjdk.org/jfx/pull/2034.diff Fetch: git fetch https://git.openjdk.org/jfx.git pull/2034/head:pull/2034 PR: https://git.openjdk.org/jfx/pull/2034
