RFR: Merge jfx19 [v2]

[Kevin Rushforth]

> Merge `jfx19` into master.

Kevin Rushforth has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:

 - Merge jfx19
 - 8289611: MouseLocationOnScreenTest sometimes fails on Mac M1
   
   Reviewed-by: kcr
 - 8289835: Change JavaFX release version to 20
   
   Reviewed-by: arapte

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

Changes:
  - all: https://git.openjdk.org/jfx/pull/832/files
  - new: https://git.openjdk.org/jfx/pull/832/files/afdc8ac8..afdc8ac8

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jfx&pr=832&range=01
 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=832&range=00-01

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jfx/pull/832.diff
  Fetch: git fetch https://git.openjdk.org/jfx pull/832/head:pull/832

PR: https://git.openjdk.org/jfx/pull/832