Nearly clean backport to `jfx11u` (the only conflict was in the copyright years in one of the unit tests). I tested this along with the other VS 2019 and WebKit 613.1 fixes together in the `test-kcr-11.0.15` branch.
------------- Commit messages: - 8278980: Update WebKit to 613.1 Changes: https://git.openjdk.java.net/jfx11u/pull/77/files Webrev: https://webrevs.openjdk.java.net/?repo=jfx11u&pr=77&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8278980 Stats: 412962 lines in 6737 files changed: 231442 ins; 135635 del; 45885 mod Patch: https://git.openjdk.java.net/jfx11u/pull/77.diff Fetch: git fetch https://git.openjdk.java.net/jfx11u pull/77/head:pull/77 PR: https://git.openjdk.java.net/jfx11u/pull/77
