[jdk17u-dev] RFR: 8294254: [macOS] javax/swing/plaf/aqua/CustomComboBoxFocusTest.java failure

[Goetz Lindenmaier]

This fixes a small issue on mac. 

Skipped change to ProblemList as the test is not listed in 17. Will mark clean.

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

Commit messages:
 - Backport 358ac07255cc640cbcb9b0df5302d97891a34087

Changes: https://git.openjdk.org/jdk17u-dev/pull/2029/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2029&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8294254
  Stats: 7 lines in 2 files changed: 2 ins; 2 del; 3 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/2029.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/2029/head:pull/2029

PR: https://git.openjdk.org/jdk17u-dev/pull/2029