Workaround for incomplete transition from labelling regular meeting materials as 'active' to labelling as 'sessonly'.

 - Legacy-Id: 9328

Author: levkowetz

ietf/doc/models.py

@@ -238,7 +238,7 @@ def meeting_related(self):
                    or (self.session_set.exists() if isinstance(self, Document) else self.doc.session_set.exists()))
         elif self.type_id in ("slides",):
             return (self.name.split("-")[1] == "interim"
-                   or (self.get_state('slides') in ("sessonly","archived") ))
+                   or (self.get_state('slides').slug in ("active", "sessonly","archived") ))
         else:
             return False