RFR: 8352905: Open some JComboBox bugs 1 [v3]

[Alisen Chung]

> Updating and opening some tests

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

  fix test

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/24495/files
  - new: https://git.openjdk.org/jdk/pull/24495/files/57bb0878..9b36a10f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=24495&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=24495&range=01-02

  Stats: 36 lines in 1 file changed: 10 ins; 4 del; 22 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