[jfx19] RFR: 8290348: TreeTableView jumping to top [v2]

[Ajit Ghaisas]

On Sun, 17 Jul 2022 18:59:22 GMT, Johan Vos <jvos at openjdk.org> wrote:

>> Do not recalculate total estimated size recursively.
>> 
>> In the (unlikely) event that the recalculation triggers a new recalculation (e.g. when the height of a Cell is changed), do not start this recalculation.
>> The cache and cache size may become inconsistent if a recursive calculation is started.
>> This fixes JDK-8290348
>
> Johan Vos has updated the pull request incrementally with one additional commit since the last revision:
> 
>   fix issue with IDE-indicated unused statement

I tested on macOS. It is observed that the newly added test passes even without the `VirtualFlow.java` code change done in this PR.

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PR: https://git.openjdk.org/jfx/pull/836