[Speedgrader] Enable Grading for Savvas MyPerspectives Assignments

[ingalse]

Problem statement:

Canvas users are unable to use Speedgrader when grading assignments imported using the Savvas MyPerspectives LTI. This is very inconvenient. It would be much easier to grade submissions using the Speedgrader function.

Proposed solution:

Enable Canvas users to use Speedgrader when grading Savvas MyPerspectives submissions.

User role(s):

instructor,designer