Order elements by name on API

arkindex/documents/api.py

@@ -21,7 +21,7 @@ class ElementsList(ListAPIView):
             type=self.request.query_params.get('type', ElementType.Volume)
         )
 
-        return documents
+        return documents.order_by('type', 'name')
 
 
 class RelatedElementsList(ListAPIView):