Fix params field when deleting a report

tailbone/views/master.py

@@ -2250,6 +2250,12 @@ class MasterView(View):
         """
         return kwargs
 
+    def template_kwargs_delete(self, **kwargs):
+        """
+        Method stub, so subclass can always invoke super() for it.
+        """
+        return kwargs
+
     def get_db_engines(self):
         """
         Must return a dict (or even better, OrderedDict) which contains all