The “Text color” button in editor seems no effect on table elements

Originally reported on https://forums.ankiweb.net/t/the-text-color-button-in-editor-seems-no-effect-on-table-elements/42358

Reproduce the editor issue described in the title, focusing on applying text color to content inside table elements. Trace the editor's table and text-color handling to identify the relevant entry point; done means the selected color visibly applies to table text as it does elsewhere.

Written by the indexing model from the issue text.