RFR: Merge jfx17

[Kevin Rushforth]

Merge `jfx17` branch into `master`.

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Commit messages:
 - Merge jfx17
 - 8212088: Missing copyright notices for property files
 - 8271086: Block comments of form '/***' are treated as javadoc comments
 - 8240640: [macos] Wrong focus behaviour with multiple Alerts
 - 8271230: Remove obsolete test classes and data files from 3DViewer sample

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - master: https://webrevs.openjdk.java.net/?repo=jfx&pr=596&range=00.0
 - jfx17: https://webrevs.openjdk.java.net/?repo=jfx&pr=596&range=00.1

Changes: https://git.openjdk.java.net/jfx/pull/596/files
  Stats: 9996 lines in 269 files changed: 1836 ins; 7167 del; 993 mod
  Patch: https://git.openjdk.java.net/jfx/pull/596.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/596/head:pull/596

PR: https://git.openjdk.java.net/jfx/pull/596