Include additional stabilization fixes of WebKit 613.1 Sanity testing did not show any concerns.
------------- Commit messages: - Cherry-pick WebKit 613.1 stabilization fixes Changes: https://git.openjdk.java.net/jfx/pull/733/files Webrev: https://webrevs.openjdk.java.net/?repo=jfx&pr=733&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8281711 Stats: 1219 lines in 127 files changed: 767 ins; 169 del; 283 mod Patch: https://git.openjdk.java.net/jfx/pull/733.diff Fetch: git fetch https://git.openjdk.java.net/jfx pull/733/head:pull/733 PR: https://git.openjdk.java.net/jfx/pull/733
