RFR: 8319066: Application window not activated in macOS 14 Sonoma when launched from command line

[Jose Pereda]

On macOS 14. when a JavaFX application is launched from the command line it is not activated, and the terminal application remains active.

This PR forces the application activation on macOS 14, in case the app didn't get activated yet (when launched from a shortcut icon, for instance).

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Commit messages:
 - force application activation on macOS 14

Changes: https://git.openjdk.org/jfx/pull/1273/files
 Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1273&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8319066
  Stats: 9 lines in 1 file changed: 9 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jfx/pull/1273.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1273/head:pull/1273

PR: https://git.openjdk.org/jfx/pull/1273