remove XXXs related to keys

www/common/common-interface.js

@@ -602,13 +602,12 @@ define([
     UI.confirmButton = function (originalBtn, config, _cb) {
         config = config || {};
         var cb = Util.once(Util.mkAsync(_cb));
-
         var classes = 'btn ' + (config.classes || 'btn-primary');
 
         var button = h('button', {
             "class": classes,
             title: config.title || ''
-        }, Messages.areYouSure || "Are you sure?"); // XXX
+        }, Messages.areYouSure);
         var $button = $(button);
 
         var div = h('div', {