Revamp the presentation of feedback information on the assignment submissions page by replacing the current column-based display with a more user-friendly modal interface featuring tabbed content.

Prototype: Refer to the provided prototype for design specifications and functionality.

Acceptance Criteria:

1. New Action Item in Contextual Menu:
   • Add a new action item, 'View Feedback,' in the contextual menu within the grade column of the submissions table.
   • Ensure this option is available only when there are enabled and visible feedback plugins in the assignment.
2. Feedback Modal:
   • Trigger: The ‘View Feedback’ action item should open a modal when selected.
     • Modal Content:
       • Header: Display the user’s name, avatar, and user identifier (e.g., email, TBD) at the top of the modal.
       • Tabbed Interface:
         • Implement a tab structure within the modal where each tab corresponds to an enabled and visible feedback plugin.
         • Each tab should show the feedback information for the given student, replicating the summarized output previously found in the table cells.
3. Table Adjustments:
   • Remove the submission-related feedback columns from the submissions table.
     Note: This change applies only to feedback displayed in view-only mode. If feedback plugins support adding feedback in quick grading mode, those instances should still have a column in the table for quick grading that continues to support feedback addition.
4. Automated Testing:
   • Implement automated tests to ensure all changes maintain system integrity and functionality.