Include additional stabilization fixes of WebKit 613.1 Sanity testing did not show any concerns.
------------- Commit messages: - Cherry-pick WebKit 613.1 stabilization fixes (2) Changes: https://git.openjdk.java.net/jfx/pull/740/files Webrev: https://webrevs.openjdk.java.net/?repo=jfx&pr=740&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/jfx/pull/740.diff Fetch: git fetch https://git.openjdk.java.net/jfx pull/740/head:pull/740 PR: https://git.openjdk.java.net/jfx/pull/740