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

[Michael Strauß]

On Wed, 1 Oct 2025 15:43:41 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

> My testing looks good.
> 
> 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`.

I was planning to do something like this for [System Colors](https://gist.github.com/mstr2/afac42ab9587c1040a6cf7b091cee99f) on the CSS features arc, which includes all kinds of color-related system properties.

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PR Comment: https://git.openjdk.org/jfx/pull/1845#issuecomment-3357117213