[jfx17u] RFR: 8193442: Removing TreeItem from a TreeTableView sometime changes selectedItem

[Johan Vos]

clean backport of 8193442: Removing TreeItem from a TreeTableView sometime changes selectedItem

8187596: TreeView selection incorrectly changes after deleting an unselected row

Reviewed-by: aghaisas, kcr

-------------

Commit messages:
 - 8193442: Removing TreeItem from a TreeTableView sometime changes selectedItem

Changes: https://git.openjdk.org/jfx17u/pull/68/files
 Webrev: https://webrevs.openjdk.org/?repo=jfx17u&pr=68&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8193442
  Stats: 193 lines in 5 files changed: 175 ins; 12 del; 6 mod
  Patch: https://git.openjdk.org/jfx17u/pull/68.diff
  Fetch: git fetch https://git.openjdk.org/jfx17u pull/68/head:pull/68

PR: https://git.openjdk.org/jfx17u/pull/68