Show new-style locations in course staff debug info (opaque keys update)

apps/openassessment/xblock/staff_info_mixin.py

@@ -37,7 +37,11 @@ class StaffInfoMixin(object):
         status_counts, num_submissions = self.get_workflow_status_counts()
         context['status_counts'] = status_counts
         context['num_submissions'] = num_submissions
-        context['item_id'] = student_item["item_id"]
+
+        # We need to display the new-style locations in the course staff
+        # info, even if we're using old-style locations internally,
+        # so course staff can use the locations to delete student state.
+        context['item_id'] = unicode(self.scope_ids.usage_id)
 
         # Include release/due dates for each step in the problem
         context['step_dates'] = list()
@@ -127,4 +131,4 @@ class StaffInfoMixin(object):
                 criterion["total_value"] = max_scores[criterion["name"]]
 
         path = 'openassessmentblock/staff_debug/student_info.html'
-        return path, context
\ No newline at end of file
+        return path, context