Add update note menu

apps/participation/models.py

@@ -379,7 +379,8 @@ class Passage(models.Model):
             final_solution=self.pool.tournament.final)
 
     def avg(self, iterator) -> int:
-        return sum(iterator) / len(list(iterator))
+        items = [i for i in iterator if i]
+        return sum(items) / len(items) if items else 0
 
     @property
     def average_defender_writing(self):
@@ -581,6 +582,9 @@ class Note(models.Model):
         default=0,
     )
 
+    def get_absolute_url(self):
+        return reverse_lazy("participation:passage_detail", args=(self.passage.pk,))
+
     def __str__(self):
         return _("Notes of {jury} for {passage}").format(jury=self.jury, passage=self.passage)