RFR: 8155030: The Menu Mnemonics are always displayed for GTK LAF [v13]

[Abhishek Kumar]

On Thu, 4 Jul 2024 17:22:01 GMT, Alexey Ivanov <aivanov at openjdk.org> wrote:

> This changeset enables hiding / showing mnemonics on `JMenuBar` only. Do you plan to update `ButtonUI` and `LabelUI` for GTK Look-and-Feel too?

Not as a part of this PR. It can be taken up as other bug.

@aivanov-jdk Imports are expanded and sorted as per recent review comments. I guess everything is fine now.

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PR Comment: https://git.openjdk.org/jdk/pull/18992#issuecomment-2209447994
PR Comment: https://git.openjdk.org/jdk/pull/18992#issuecomment-2209448963