Twenty Twenty: links do not inherit user-defined text colors in the editor

[sabernhardt]

The front-end styles set the text color for links to inherit inside a block with a specific text color. In the editor, these links still use the standard link color.

Steps to reproduce:

1. Activate the Twenty Twenty theme.
2. Create a new post or open the Widgets editor.
3. Create a rich text block such as a Paragraph or a Heading.
4. Enter text in that block and add a link to part of that text.
5. In the sidebar, choose a Text color for the block. It can be one of the theme presets or a custom color.
6. Notice that the editor displays the link in the theme accent color instead of the color you chose.
7. Save the post or widget and view the front end. The link color should match the color of the rest of the text in the block.

[sabernhardt]

paragraph block in editor, before applying patch

[sabernhardt]

paragraph block on front

[sabernhardt]

paragraph block in editor, with the patch

[sabernhardt]

The first image's filename is wrong, but I re-attached each image so the order would be correct.

[webcommsat]

I can replicate this issue and the patch works for me. Really helpfully set out information so easier to follow thanks @sabernhardt

[sabernhardt]

#56255 was marked as a duplicate.

[audrasjb]

Before patch

[audrasjb]

Before/after patch : front end remains the same

[audrasjb]

After patch (editor)

[audrasjb]

Works fine. Self assigning for commit.

[audrasjb]

In 54153:

Twenty Twenty: Ensure link color is inherited from paragraph in the editor.

This changeset improves link colors consistency between front-end and the editor.

Props sabernhardt, webcommsat, audrasjb.
Fixes #56214.