[jdk11u-dev] RFR: 7132796: [macosx] closed/javax/swing/JComboBox/4517214/bug4517214.java fails on MacOS

[Andrew Lu]

I backport this for parity with 11.0.23-oracle.

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Commit messages:
 - Backport 81d7475d20133fd7dfb0ad66caee4e929e0291af

Changes: https://git.openjdk.org/jdk11u-dev/pull/2348/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2348&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-7132796
  Stats: 107 lines in 2 files changed: 100 ins; 7 del; 0 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2348.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2348/head:pull/2348

PR: https://git.openjdk.org/jdk11u-dev/pull/2348