Draft: Issue #3555302: Link button does not work in CKEditor
Closes #3555302
Reproduction steps
- 
Checkout this branch and run: npm ci npm run build - 
Clear the Drupal cache  - 
Open the extension in Canvas  - 
Fill out some keywords, then click "Generate content guidance" to move to the next tab  - 
Wait for the URLs to load, scroll to the bottom and click "Generate content guidance"  - 
This tab is empty, just click the final tab top right "Content outline" (if this doesn't get out of the Loading stage then go back to "Guidance" then "Content outline" again  - 
In the WYSIWYG area, try to use the Link button. See that this fails and shifts the whole modal upwards. This is happening because the link overlay is placed into markup that is attached to the end of the body, rather than within our current overlay 
 
Edited  by Sally Young
