RFR: 8263402: MemoryLeak: Node hardreferences it's previous Parent after csslayout and getting removed from the scene

[Ambarish Rapte]

On Mon, 22 Mar 2021 14:35:58 GMT, Florian Kirmaier <fkirmaier at openjdk.org> wrote:

>  I think it's also quite important to support fast removing/adding subtrees.

Yes, Adding listener seems over kill here. Lets go with `WeakReference` approach. I will take a look at the test update.

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PR: https://git.openjdk.java.net/jfx/pull/424