RFR: 8370498: Improve how Node detects whether a layout property change requires a new layout pass [v4]

[Marius Hanl]

On Mon, 27 Oct 2025 14:44:44 GMT, John Hendrikx <jhendrikx at openjdk.org> wrote:

>> This new check is much more accurate to detect whether a parent is currently laying out its children. The previous code almost never worked, resulting in additional unnecessary layouts.
>
> John Hendrikx has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Rename test

I did tests on 3 different applications and could not spot any problems!

What I did not test:
- `ToolBar`
- `BubbleChart`
- `AreaChart`
- `Pagination`
- Most of the 3D `Shape` classes

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PR Comment: https://git.openjdk.org/jfx/pull/1945#issuecomment-3478233496