RFR: 8313424: JavaFX controls in the title bar [v47]

[Andy Goryachev]

On Tue, 4 Feb 2025 12:41:24 GMT, Michael Strauß <mstrauss at openjdk.org> wrote:

>> Implementation of [`EXTENDED`](https://gist.github.com/mstr2/0befc541ee7297b6db2865cc5e4dbd09) and `EXTENDED_UTILITY` stage style.
>
> Michael Strauß has updated the pull request incrementally with one additional commit since the last revision:
> 
>   add "maximized" pseudo-class for custom maximize button

I like the buttons in the content area of the test stage in the monkey tester!

Do you mind if I eventually move the changes to the "Stage" page?

![Screenshot 2025-02-04 at 11 06 43](https://github.com/user-attachments/assets/07d32b46-04ba-452e-aab2-65974bef64f4)

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PR Comment: https://git.openjdk.org/jfx/pull/1605#issuecomment-2634831936