Test to be automated: MDLQA-1788

 Testing instructions

Test Prerequisites:

• assignments created should be of the new assignment module type
• maximum grading values should be a numeric value greater than 0
• testing should be performed as a teacher user
• an existing marking guide should have been created and set to ready but no marking has been completed

Test Steps:

1. Open an assignment that has a marking guide saved as ready but no marking has been completed
2. Click the Advanced Grading tab, then click 'Edit the current form definition'
3. Click Save as draft
4. Re-open the marking guide and check that the marking guide is still as it should be