RFR: 8354943: [Linux] Simplify and update glass gtk backend: window sizing, positioning, and state management issues [v50]

[Martin Fox]

On Thu, 14 Aug 2025 15:26:59 GMT, Martin Fox <mfox at openjdk.org> wrote:

>> I've put an `assumeTrue(PlatformUtil.isWindows());` referencing JDK-8364547. Is it the correct bug?
>
> Just remove the assumeTrue call here. I'll submit the fix for JDK-8364547 in the next day or so and then these system tests will just work.

BTW, it's both the minSize and maxSize tests that are failing on both Mac and Windows. It's really just easier to fix these bugs in advance of submitting this system test.

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PR Review Comment: https://git.openjdk.org/jfx/pull/1789#discussion_r2276991893