RFR: 8353007: Open some JComboBox bugs 2 [v5]

[Alisen Chung]

> Updating and opening some tests

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

  reduce number of rows

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Changes:
  - all: https://git.openjdk.org/jdk/pull/24496/files
  - new: https://git.openjdk.org/jdk/pull/24496/files/d7bba188..e53b046c

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=24496&range=04
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=24496&range=03-04

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 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