A listener was added but never removed. This patch removes the listener when the menu it links to is cleared. Fix for https://bugs.openjdk.org/browse/JDK-8319779
------------- Commit messages: - A listener was added but never removed. Changes: https://git.openjdk.org/jfx/pull/1283/files Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1283&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8319779 Stats: 61 lines in 1 file changed: 40 ins; 19 del; 2 mod Patch: https://git.openjdk.org/jfx/pull/1283.diff Fetch: git fetch https://git.openjdk.org/jfx.git pull/1283/head:pull/1283 PR: https://git.openjdk.org/jfx/pull/1283