[Peer Review] Display more information and allow filtering in peer review moderation page

Problem statement:

When manually assigning a peer review, there is currently there is no indication in the drop-down list of students to show who is already assigned or who has completed the initial assignment/post. When assigning a late student manually, after the main cohort was automatically done at the due date, it is possible to assign the student to a peer who hasn't completed the task so they have nothing to respond to. Search function is limited to "search by reviewer" and "search by peer review". There is also no option to see which students have not been assigned, the only option being to navigate through multiple pages of student names.

Proposed solution:

After clicking the "Give [student name] another submission to assess" link: -grey out students who have not completed the initial assignment from the drop-down menu so they can't be selected. -include an icon after student names to indicate assigned status. Page navigation/ search: Add a filter to display unassigned or assigned students.

User role(s):

instructor