[jdk17u-dev] RFR: 8283387: [macos] a11y : Screen magnifier does not show selected Tab

[Goetz Lindenmaier]

I backport this for parity with 17.0.15-oracle.

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

Commit messages:
 - Backport d5cd4a3a28a85bbcaa3c0c7f2e74e0684b5efcab

Changes: https://git.openjdk.org/jdk17u-dev/pull/3178/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3178&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8283387
  Stats: 113 lines in 2 files changed: 110 ins; 1 del; 2 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3178.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3178/head:pull/3178

PR: https://git.openjdk.org/jdk17u-dev/pull/3178