RFR: 8302472 WebColorFieldSkin should use precompiled Pattern

[Kevin Rushforth]

On Tue, 14 Feb 2023 16:12:29 GMT, John Hendrikx <jhendrikx at openjdk.org> wrote:

> Split off from https://github.com/openjdk/jfx/pull/837
> 
> This uses a precompiled regex pattern and cleans up the code in WebColorFieldSkin a bit.

@hjohn you can integrate this when you are ready.

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PR: https://git.openjdk.org/jfx/pull/1032