Create base-css-class button-group

Change-Id: I05afa3885c505ec59a555710c935016de396be26
diff --git a/dev/js/src/match.js b/dev/js/src/match.js
index 235aabb..3827af1 100644
--- a/dev/js/src/match.js
+++ b/dev/js/src/match.js
@@ -197,7 +197,7 @@
 
         // Temporary
         var ops = document.createElement('div');
-        ops.classList.add('action', 'bottom', 'hui');
+        ops.classList.add('action', 'bottom', 'button-group');
 
         var meta = document.createElement('span');
         ops.appendChild(meta);