[Gradebook Settings] Allow grace period before automatically grading missing assignment

Problem statement:

The grade book settings under the "late policies" tab, the instructor currently has the ability to check a box to "automatically apply grade for missing assignments", but this automatic grade is entered as soon as the due date has passed without allowing for a grace period following the due date. There are some circumstances in which the instructor may want to allow a grace period after the due date before the assignment is given an automatic grade.

Proposed solution:

In the grade book settings > late policies tab, add a date box below the "automatically apply grade for missing assignments" checkbox that allows the instructor to set an "after" date. For example, if "automatically apply grade for missing assignments", the user could select "5 days after the due date" or something along those lines that would provide a 5 day grace period before the automatic grade is applied.

User role(s):

admin,instructor