RFR: 8350048: Enforce threading restrictions for show and hide methods in Window, Control, and Skin [v5]

[Michael Strauß]

On Fri, 7 Mar 2025 15:30:46 GMT, Andy Goryachev <angorya at openjdk.org> wrote:

> will do next time, to avoid re-setting the approvals ;-)

I'll re-approve if you decide to do the changes anyway.

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PR Review Comment: https://git.openjdk.org/jfx/pull/1717#discussion_r1985279553