Fix Nomination visibility bug (#1588)

self.nominee is a Nominee, not a User

Author: di

nominations/models.py

@@ -227,7 +227,7 @@ def visible(self, user=None):
         if user is None:
             return False
 
-        if user.is_staff or user == self.nominee or user == self.nominator:
+        if user.is_staff or user == self.nominee.user or user == self.nominator:
             return True
 
         return False