Merge pull request #23 from chennin/clear-mission-frame

clear frame after last turnin

Author: lunarplasma

controller.py

@@ -177,6 +177,8 @@ def update_massacre_display(self):
             while not self.massacre_frame:
                 pass
             self.massacre_frame.update_data(massacre_data)
+        else:
+            self.massacre_frame.clear_content()
 
     def stop(self):
         """Shutdown the controller"""