RFR: 8284654: Modal behavior returns to wrong stage

[Thiago Milczarek Sayao]

On Fri, 22 Apr 2022 19:26:36 GMT, Thiago Milczarek Sayao <tsayao at openjdk.org> wrote:

> When there's an APPLICATION_MODAL window, all other windows are disabled and re-enabled when the APPLICATION_MODAL window closes. This causes `requestToFront()` to be called on every window, and it does not guarantee order.
> 
> The fix also works for:
> https://bugs.openjdk.java.net/browse/JDK-8269429
> 
> But this one might need another fix:
> https://bugs.openjdk.java.net/browse/JDK-8240640

The test does not set the Window owner. It's one APPLICATION_MODAL window.

I have adjusted the PR to handle this case. It will set focus on the latest opened window when re-enabling, but will not change stacking order.

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PR: https://git.openjdk.java.net/jfx/pull/784