RFR: 8369836: Update HeaderBar API [v2]

[Andy Goryachev]

On Thu, 23 Oct 2025 17:58:24 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

>> Michael Strauß has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Make leftSystemInset/rightSystemInset/minSystemHeight attached properties
>
> modules/javafx.graphics/src/main/java/javafx/scene/layout/HeaderBar.java line 287:
> 
>> 285:      *
>> 286:      * @param stage the {@code Stage}
>> 287:      * @return the {@code leftSystemInset} property
> 
> Needs `@since 26` javadoc tag (for all new methods).

please explain RTL behavior (here and elsewhere)

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PR Review Comment: https://git.openjdk.org/jfx/pull/1936#discussion_r2528494548