RFR: 8241840: Memoryleak: Closed focused Stages are not collected with Monocle. [v7]

[Ambarish Rapte]

On Fri, 14 Aug 2020 10:09:22 GMT, Florian Kirmaier <fkirmaier at openjdk.org> wrote:

>> Closed focused Stages are not collected with Monocle
>> 
>> This commit adds a unit-test and a fix for collecting focused closed stages.
>> 
>> ticket: https://bugs.openjdk.java.net/browse/JDK-8241840
>
> Florian Kirmaier has updated the pull request incrementally with one additional commit since the last revision:
> 
>   JDK-8241840
>   small formatting changes based on codereview

Marked as reviewed by arapte (Reviewer).

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PR: https://git.openjdk.java.net/jfx/pull/153