Steps to reproduce

1. Create a new page
2. In the Editor tool bar, select to Insert a Link, and choose Web Link
3. Add a link and Save, e.g.:
   1. Address: https://www.google.com
   2. Link text: Google
4. Highlight the link and set it to a different color using the tool bar
5. Click the link and try to edit it

Expected behavior

Both "Address" and "Link text" fields will show up and be configurable

Actual behavior

"Address" field remains, but "Link text" field is completely missing

Workarounds

If the link is returned to its original state (i.e. no custom color set) by highlighting + clicking the color chooser, it will return to the expected behavior once again.

Alternatively, you can change the link text in the editor itself by modifying the text somewhere in the middle of the string (adding text to the end of the colored link will result in the newly added text being unlinked).