Add edit permission check for collection case priors view

atlas/views.py

@@ -3144,6 +3144,9 @@ def collection_case_priors(request, exam_id, case_number):
 
     previous = collection.get_previous_case(casedetail.case)
     next = collection.get_next_case(casedetail.case)
+    # Determine whether the current user can edit this collection/case so
+    # included fragments which rely on `can_edit` have the value available.
+    can_edit = request.user.is_superuser or collection.author.filter(pk=request.user.pk).exists()
 
     return render(
         request,
@@ -3161,6 +3164,7 @@ def collection_case_priors(request, exam_id, case_number):
             "case_number": case_number,
             "added_priors": added_priors,
             "available_priors": available_priors,
+            "can_edit": can_edit,
         },
     )