RFR: 8278980: Update WebKit to 613.1 [v2]

[Johan Vos]

On Wed, 2 Feb 2022 15:29:51 GMT, Ambarish Rapte <arapte at openjdk.org> wrote:

>> Update JavaFX WebKit to GTK WebKit 2.34 (613.1).
>> 
>> Verified the updated version build, tests run and sanity testing.
>> This does not cause any issues except a unit test failure `IrresponsiveScriptTest`.
>> It is recorded and ignored using [JDK-8280421](https://bugs.openjdk.java.net/browse/JDK-8280421)
>
> Ambarish Rapte has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Restore commits that were mistakenly reverted.
>   
>   8279013: ES2Pipeline fails to detect AMD vega20 graphics card
>   8277853: With Touch enabled devices scrollbar disappears and the table is scrolled to the beginning
>   8277122: SplitPane divider drag can hang the layout

builds on all platforms, basic tests are ok. We should do an EA release soon after this is merged, so we can have more testers.

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Marked as reviewed by jvos (Reviewer).

PR: https://git.openjdk.java.net/jfx/pull/723