use integer sort string for archives not using imdb ids

pandora/item/models.py

@@ -776,6 +776,8 @@ class Item(models.Model):
 
         #sort keys based on database, these will always be available
         s.itemId = self.itemId.replace('0x', 'xx')
+        if not settings.USE_IMDB:
+            s.itemId = ox.sort_string(ox.fromAZ(s.itemId)) 
         s.modified = self.modified
         s.created = self.created
         s.rightslevel = self.level