[jfx21u] RFR: 8319779: SystemMenu: memory leak due to listener never being removed

[Jose Pereda]

On Thu, 1 Aug 2024 10:04:12 GMT, Johan Vos <jvos at openjdk.org> wrote:

> almost clean backport of 8319779: SystemMenu: memory leak due to listener never being removed
> Didn't apply clean because the imports where shuffled.

Marked as reviewed by jpereda (Reviewer).

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PR Review: https://git.openjdk.org/jfx21u/pull/66#pullrequestreview-2212342712