feat(config_management): Ability to add a host to a config group

!17 #42

app/core/mixin/history_save.py

@@ -125,6 +125,11 @@ class SaveHistory(models.Model):
             item_parent_pk = self.team.pk
             item_parent_class = self.team._meta.model_name
 
+        if self._meta.model_name == 'configgrouphosts':
+
+            item_parent_pk = self.group.id
+            item_parent_class = self.group._meta.model_name
+
 
         if not before: