[jfx17u] RFR: 8282099: Cherry-pick WebKit 613.1 stabilization fixes (2)

[Kevin Rushforth]

Clean backport to `jfx17u`. I tested the backports of [JDK-8281711](https://bugs.openjdk.java.net/browse/JDK-8281711), [JDK-8282099](https://bugs.openjdk.java.net/browse/JDK-8282099), and [JDK-8281089](https://bugs.openjdk.java.net/browse/JDK-8281089) together in the `test-kcr-17.0.3` branch.

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Commit messages:
 - 8282099: Cherry-pick WebKit 613.1 stabilization fixes (2)

Changes: https://git.openjdk.java.net/jfx17u/pull/36/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jfx17u&pr=36&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8282099
  Stats: 186 lines in 11 files changed: 116 ins; 33 del; 37 mod
  Patch: https://git.openjdk.java.net/jfx17u/pull/36.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx17u pull/36/head:pull/36

PR: https://git.openjdk.java.net/jfx17u/pull/36