In "view xx submitted assignments", as admin, click on "grade" link:
- one popup is opened.
- introduce one grade and one comment.
- PROBLEM C: It's impossible to add images in the comments editor.
- PROBLEM D: The comments field has not its corresponding "submissioncommentformat" field.
- Save changes
- PROBLEM E: The popup remains with "horrible" page with blocks and message "Changes saved. This window should close automatically. If not, please close it now"
- Close the popup manually. Reload the "view xx submitted assignments" pages. Both the comment and the grade have been saved properly.
- PROBLEM F: The comment in that page shows plain text so you can see the HTML (if quick grading is enabled).