RFR: 8313424: JavaFX controls in the title bar [v49]

[Michael Strauß]

On Tue, 18 Feb 2025 18:19:33 GMT, Andy Goryachev <angorya at openjdk.org> wrote:

>> `HeaderButtonOverlay` inherits its node orientation from the scene, which is under the control of the application developer. On the other hand, `allowRtl` is under the control of JavaFX developers (that's us), specifying whether the selected header button implementation supports RTL layouts at all. Currently, all header button implementations do.
>> 
>> The property is there to make all aspects of `HeaderButtonOverlay` styleable, so that future JavaFX developers can add other header button styles that may have fixed locations (i.e. don't move from one side to the other in RTL mode).
>
> should it have a different name then?  `fixedPosition` or something like that?

I've removed `allowRtl` completely. Let's entertain this problem when (and if) we decide to have system-provided header buttons that don't adjust for RTL mode.

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PR Review Comment: https://git.openjdk.org/jfx/pull/1605#discussion_r1964663979