RFR: 8313424: JavaFX controls in the title bar [v41]

[Michael Strauß]

On Mon, 27 Jan 2025 23:39:26 GMT, Michael Strauß <mstrauss at openjdk.org> wrote:

>> Michael Strauß has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   hide default window buttons on macOS
>
> Another change is the option to use multiple header bars, which now cooperate gracefully. This enables application developers to create advanced layouts, for example having two header bars in a `SplitPane`, where each `HeaderBar` has a different background.

> @mstr2 there is still active development going on - should this PR be sent back to Draft?

I've incorporated review feedback received so far. Looking forward to additional feedback and reviews.

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PR Comment: https://git.openjdk.org/jfx/pull/1605#issuecomment-2619689928