RFR: 8285700: [TreeTableView] graphic property of TreeItem is still visible after collapsing tree

[Andy Goryachev]

On Fri, 7 Jul 2023 05:25:34 GMT, Karthik P K <kpk at openjdk.org> wrote:

> In `TreeTableRowSkin`, graphic was not updated along with tree item update.
> 
> Made changes to update graphics of TreeTableView row in `updateTreeItem()` method.
> 
> Added options in monkey tester to add graphics and subnodes to `TreeTableView` rows.

tested using the modified MonkeyTester, works with the fix and fails in the master branch.
good job!

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Marked as reviewed by angorya (Reviewer).

PR Review: https://git.openjdk.org/jfx/pull/1172#pullrequestreview-1519204601