[Gradebook] Add comment to multiple students from Gradebook view

[WilMeiners]

Problem statement:

From the gradebook view there is an option to "Message Students Who." If I want to leave a Comment on a student's work, however, I have to do that individually either from Speedgrader or from the gradebook view. Often I am leaving the same comment for multiple students and prefer this to be a comment so they will see it when they look at their grades.

Proposed solution:

Add a "Comment on Students Who" option in this menu that has the same functionality as the "Message Student Who" option, but adds a comment to their submission rather than sending a Canvas Message.

User role(s):

instructor