Where is the saved draft text?

When using the new speedgrader I have gotten a message that the comments have been saved as a draft (see figure below). However, there is no means that I have found to see or recover this draft.

Saved_draft-gradebook-20170906-cropped.png

Inside the inspector we can see the element that is this popup message:

Saved_draft-gradebook-20170906a-cropped.png

The saved text box shows:

Saved_draft-gradebook-20170906-submit-box.png