Add thumbUrl and artUrl properties to collections

plexapi/library.py

@@ -1595,7 +1595,17 @@ class Collections(PlexPartialObject):
     @deprecated('use "items" instead')
     def children(self):
         return self.fetchItems(self.key)
-        
+
+    @property
+    def thumbUrl(self):
+        """ Return the thumbnail url for the collection."""
+        return self._server.url(self.thumb, includeToken=True) if self.thumb else None
+
+    @property
+    def artUrl(self):
+        """ Return the art url for the collection."""
+        return self._server.url(self.art, includeToken=True) if self.art else None
+
     def item(self, title):
         """ Returns the item in the collection that matches the specified title.