[jfx21u] RFR: 8315657: Application window not activated in macOS 14 Sonoma

[Kevin Rushforth]

Clean backport to jfx21u

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Commit messages:
 - Backport f2dd4bdb7b7d2877fb8aa805737c5d9bd89f9cef

Changes: https://git.openjdk.org/jfx21u/pull/18/files
 Webrev: https://webrevs.openjdk.org/?repo=jfx21u&pr=18&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8315657
  Stats: 21 lines in 2 files changed: 9 ins; 0 del; 12 mod
  Patch: https://git.openjdk.org/jfx21u/pull/18.diff
  Fetch: git fetch https://git.openjdk.org/jfx21u.git pull/18/head:pull/18

PR: https://git.openjdk.org/jfx21u/pull/18