CLONE - In an Offline activity assignment, a teacher can grade and give comments on an assignment completed offline

1. Login as a teacher and access the Ofline activity assignment.
2. Follow the 'No attempts have been made on this assignment' link and select a student to grade.
3. Add a grade and comment then click the 'Save changes' button.
4. Check that the grade, comment and 'Last modified (Teacher)' date are correctly displayed for the assignment just graded and the link text in the status column has changed from 'Grade' to 'Update'.