fixed minor visual bug in InstructorFeedbackResultsPage
changed the status message that is displayed when the profile is not available for the user to view
changed the status message that is shown to users when they cant view the student's profile. removed the join link for instructors
handles the severe exceptions that are thrown when the given user's details does not have a profile picture for various reasons
uploads the student's photo earlier in instructorStudentListPage to avoid persistence issues