RFR: 8306121: Scene not rendered initially when changing scenes after fix for JDK-8296621 [v21]

[Jose Pereda]

On Thu, 15 Jun 2023 12:16:20 GMT, Thiago Milczarek Sayao <tsayao at openjdk.org> wrote:

>> I replicated the fix on #1054 on Linux.
>> 
>> Also fixes [Monocle: Stage no longer gets focus after fix for JDK-8296621](https://bugs.openjdk.org/browse/JDK-8304734)
>
> Thiago Milczarek Sayao has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Review changes

Looks good to me!

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Marked as reviewed by jpereda (Reviewer).

PR Review: https://git.openjdk.org/jfx/pull/1110#pullrequestreview-1481439584