In template, use handler reverse_url instead of application one

tornado/web.py

@@ -588,7 +588,7 @@ class RequestHandler(object):
             _=self.locale.translate,
             static_url=self.static_url,
             xsrf_form_html=self.xsrf_form_html,
-            reverse_url=self.application.reverse_url
+            reverse_url=self.reverse_url
         )
         args.update(self.ui)
         args.update(kwargs)