Changed chats list order to descending (#279)

ayushma/views/chat.py

@@ -51,7 +51,7 @@ def get_queryset(self):
         if user.is_superuser and self.action == "list_all":
             return queryset
 
-        return queryset.filter(user=user)
+        return queryset.filter(user=user).order_by("-created_at")
 
     def perform_create(self, serializer):
         project_id = self.kwargs["project_external_id"]