[jdk11u-dev] RFR: 8054572: [macosx] JComboBox paints the border incorrectly

[Andrew Lu]

I backport this for parity with 11.0.23-oracle.

Resolved the copyright, will mark as clean.

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Commit messages:
 - Backport 8082c24a0df3f4861ea391266bdfe6cdd1a77bab
 - Backport 8082c24a0df3f4861ea391266bdfe6cdd1a77bab

Changes: https://git.openjdk.org/jdk11u-dev/pull/2346/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2346&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8054572
  Stats: 123 lines in 2 files changed: 120 ins; 2 del; 1 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2346.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2346/head:pull/2346

PR: https://git.openjdk.org/jdk11u-dev/pull/2346