[jdk17u-dev] RFR: 8300269: The selected item in an editable JComboBox with titled border is not visible in Aqua LAF

[Goetz Lindenmaier]

I backport this to fix the issue in 17.

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Commit messages:
 - Backport ef6200c727332796d2e1c8ae3bfa155cbaa72f4c

Changes: https://git.openjdk.org/jdk17u-dev/pull/2027/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2027&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8300269
  Stats: 184 lines in 2 files changed: 183 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/2027.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/2027/head:pull/2027

PR: https://git.openjdk.org/jdk17u-dev/pull/2027