RFR: 8264677 MemoryLeak: Progressindicator leaks, when treeShowing is false [v4]

[Ambarish Rapte]

On Fri, 23 Apr 2021 16:25:48 GMT, Florian Kirmaier <fkirmaier at openjdk.org> wrote:

>> Fixing leak in ProgressIndicator when treeShowing is false
>
> Florian Kirmaier has updated the pull request incrementally with one additional commit since the last revision:
> 
>   8264677
>   Readded countdownlatch for onShown based on code review

looks good to me.

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Marked as reviewed by arapte (Reviewer).

PR: https://git.openjdk.java.net/jfx/pull/455