RFR: 8352905: Open some JComboBox bugs 1 [v4]

[Alisen Chung]

> Updating and opening some tests

Alisen Chung has updated the pull request incrementally with one additional commit since the last revision:

  update tests

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/24495/files
  - new: https://git.openjdk.org/jdk/pull/24495/files/9b36a10f..95cdfc12

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=24495&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=24495&range=02-03

  Stats: 28 lines in 2 files changed: 11 ins; 8 del; 9 mod
  Patch: https://git.openjdk.org/jdk/pull/24495.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24495/head:pull/24495

PR: https://git.openjdk.org/jdk/pull/24495