allow adapterindexattributes title getter

concept.py

@@ -496,6 +496,8 @@ class IndexAttributes(object):
                         [v for v in indexValues if v is not None]).strip()
 
     def title(self):
+        if self.adaptedIndexAttributes is not None:
+            return self.adaptedIndexAttributes.title()
         context = self.context
         title = context.title
         if title is None: