Cherry-pick stabilisation fixes till 2.38.4. Verified unit tests and drt. No issue observed.
------------- Commit messages: - Cherry-pick WebKit 614.1 stabilization fixes till 2.38.4 Changes: https://git.openjdk.org/jfx/pull/1033/files Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1033&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8302294 Stats: 1797 lines in 198 files changed: 834 ins; 508 del; 455 mod Patch: https://git.openjdk.org/jfx/pull/1033.diff Fetch: git fetch https://git.openjdk.org/jfx pull/1033/head:pull/1033 PR: https://git.openjdk.org/jfx/pull/1033
