Change a check in toots list type

Now toots list can actually be AttribAccessList types. So we just check
if the type of the objects inherits from list.

main.py

@@ -463,7 +463,7 @@ class TootQueue:
         return str(self._queue)
 
     def insert(self, toots):
-        if(type(toots) == list):
+        if(issubclass(type(toots), list)):
             rv = False
             for t in toots:
                 rv2 = self.insert(t)