Found while testing MDLQA-7600

The atto editor should display user feedback when text is automatically saved. No such feedback is displayed.

Steps to reproduce:

1. Log in to the course as a teacher and access the News forum.
2. Begin to type a post. Type a few words and then stop. Wait for a minute, watching the bottom left corner of your text box.
3. Verify you see the message "Draft saved", but no dialog is ever displayed.