[jfx17u] RFR: 8286261: Selection of non-expanded non-leaf treeItem grows unexpectedly when adding two-level descendants

[Johan Vos]

8286261: Selection of non-expanded non-leaf treeItem grows unexpectedly when adding two-level descendants

Reviewed-by: aghaisas

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Commit messages:
 - 8286261: Selection of non-expanded non-leaf treeItem grows unexpectedly when adding two-level descendants

Changes: https://git.openjdk.org/jfx17u/pull/70/files
 Webrev: https://webrevs.openjdk.org/?repo=jfx17u&pr=70&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8286261
  Stats: 179 lines in 5 files changed: 171 ins; 0 del; 8 mod
  Patch: https://git.openjdk.org/jfx17u/pull/70.diff
  Fetch: git fetch https://git.openjdk.org/jfx17u pull/70/head:pull/70

PR: https://git.openjdk.org/jfx17u/pull/70