[jfx11u] RFR: 8089986: Menu beeps when mnemonics is used

[Ambarish Rapte]

Almost clean backport, with a difference in copyright year. Otherwise clean.

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Commit messages:
 - 8089986: Menu beeps when mnemonics is used

Changes: https://git.openjdk.org/jfx11u/pull/127/files
 Webrev: https://webrevs.openjdk.org/?repo=jfx11u&pr=127&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8089986
  Stats: 3 lines in 1 file changed: 3 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jfx11u/pull/127.diff
  Fetch: git fetch https://git.openjdk.org/jfx11u pull/127/head:pull/127

PR: https://git.openjdk.org/jfx11u/pull/127