Fixed a bug where subtasks data could become corrupt after migration

astrid/plugin-src/com/todoroo/astrid/subtasks/SubtasksListFragment.java

@@ -86,6 +86,7 @@ public class SubtasksListFragment extends TaskListFragment {
 
     @Override
     protected void refresh() {
+        initializeTaskListMetadata();
         setUpTaskList();
     }