RFR: 8353007: Open some JComboBox bugs 2 [v6]

[Alisen Chung]

> Updating and opening some tests

Alisen Chung has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 11 additional commits since the last revision:

 - manual tag
 - update tests
 - Merge branch 'master' of https://github.com/openjdk/jdk into 2025tsb_2
 - reduce number of rows
 - update to PassFailJFrame.forceFail
 - update to PassFailJFrame.forceFail
 - update tests
 - update jtreg
 - add rows, remove headful key
 - add rows
 - ... and 1 more: https://git.openjdk.org/jdk/compare/fbd7be4d...a4471e59

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/24496/files
  - new: https://git.openjdk.org/jdk/pull/24496/files/e53b046c..a4471e59

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=24496&range=05
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=24496&range=04-05

  Stats: 502938 lines in 8313 files changed: 171566 ins; 287054 del; 44318 mod
  Patch: https://git.openjdk.org/jdk/pull/24496.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24496/head:pull/24496

PR: https://git.openjdk.org/jdk/pull/24496