RFR: 8292353: TableRow vs. TreeTableRow: inconsistent visuals in cell selection mode [v8]

[Andy Goryachev]

> The issue is caused by TreeTableRow incorrectly selected when cell selection mode is enabled.
> 
> Changes:
> - modified TreeTableRow.updateSelection()

Andy Goryachev has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 10 commits:

 - Merge remote-tracking branch 'origin/master' into 8292353.visuals
 - 8292353: spelling
 - 8292353: typo
 - 8292353: typo
 - 8292353: whitespace
 - 8292353: added tests
 - Merge remote-tracking branch 'origin/master' into 8292353.visuals
 - 8292353: review comments
 - Merge remote-tracking branch 'origin/master' into 8292353.visuals
 - 8292353: update selection

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Changes: https://git.openjdk.org/jfx/pull/875/files
 Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=875&range=07
  Stats: 373 lines in 2 files changed: 369 ins; 1 del; 3 mod
  Patch: https://git.openjdk.org/jfx/pull/875.diff
  Fetch: git fetch https://git.openjdk.org/jfx pull/875/head:pull/875

PR: https://git.openjdk.org/jfx/pull/875