RFR: 8307538: Memory leak in TreeTableView when calling refresh [v2]

[Andy Goryachev]

On Wed, 10 May 2023 16:16:36 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

>> this test reflects the exact failure scenario described in the ticket.
>
> If it's easy to add another test for additional missing cases that would provide better coverage for your fix, it seems worth doing.

added one more test case, thanks!

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PR Review Comment: https://git.openjdk.org/jfx/pull/1129#discussion_r1191750638