RFR: 8326989 : Text selection issues on WebView after WebKit 617.1

[Jose Pereda]

On Wed, 6 Mar 2024 14:51:40 GMT, Hima Bindu Meda <hmeda at openjdk.org> wrote:

> Text Selection issue is observed due to a pending layout call. This issue is resolved by a call to the method  "updateSelectionAppearanceNow".
> Verified Sanity testing and unit test verification looks fine. No issue seen.
> 
> Note: Unit test in order to validate the fix, is in progress. Due to the robustness of the implementation to verify on all platforms, the test would be added in a followon bug-[JDK-8327478](https://bugs.openjdk.org/browse/JDK-8327478)

I've built and tested the proposed change successfully on macOS, Linux, and Windows, selecting text loaded from both URL or local html content, via mouse dragging and mouse double-clicking.

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Marked as reviewed by jpereda (Reviewer).

PR Review: https://git.openjdk.org/jfx/pull/1391#pullrequestreview-1920439949