added grade and max_grade to studentmodule to fix progress page issues

edx_sga/sga.py

@@ -550,6 +550,8 @@ def enter_grade(self, request, suffix=''):
             state['staff_score'] = score
         state['comment'] = request.params.get('comment', '')
         module.state = json.dumps(state)
+        module.grade = score
+        module.max_grade=self.max_score()
         module.save()
         log.info(
             "enter_grade for course:%s module:%s student:%s",
@@ -570,6 +572,7 @@ def remove_grade(self, request, suffix=''):
         student_id = request.params['student_id']
         submissions_api.reset_score(student_id, self.course_id, self.block_id)
         module = StudentModule.objects.get(pk=request.params['module_id'])
+        module.grade = 0
         state = json.loads(module.state)
         state['staff_score'] = None
         state['comment'] = ''