Introduce a general buttongroup menu

Change-Id: I2d84af1c9d43ce3e57b10321bd7d414a64cf68a8
diff --git a/dev/js/spec/buttongroupSpec.js b/dev/js/spec/buttongroupSpec.js
index 1e27d96..67baaef 100644
--- a/dev/js/spec/buttongroupSpec.js
+++ b/dev/js/spec/buttongroupSpec.js
@@ -103,5 +103,9 @@
       group.element().firstChild.click();
       expect(fun.count).toEqual(1);
     });
+
+    it('should open lists', function () {
+      
+    });
   });
 });