make it so instructors can view student responses (incl free response) in a different way

[kjdav]

several instructors requested a way to view all student response data for one assignment at once, on one page. For example, something like

HW 1

Q1
show q1, multiple-choice answer options, and answer** we don't currently do this, but I think it would be useful

• Kim's free-form work, confidence rating, multiple-choice answer. maybe could add the icon to show if MC was correct or not, feedback viewed, etc.?
• JP ...
• Kevin ...

Q2
...