RFR: 8362091: Window title bar should reflect scene color scheme [v3]

[Andy Goryachev]

On Wed, 1 Oct 2025 16:08:09 GMT, Michael Strauß <mstrauss at openjdk.org> wrote:

> Suggestion: consider a manual test for this (maybe adding something to MonkeyTester?). We don't have a test program in our repo that sets `Scene.Preference.colorScheme`.

This could be added to the `StagePage` there (I know there is a Stage Tester tool, but it does not remember user choices and probably can be replaced with the `StagePage`).

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PR Comment: https://git.openjdk.org/jfx/pull/1845#issuecomment-3357130657