Merge pull request #1241 from edx/db/base-js-smoothscroll

base.js requires jquery.smoothScroll

cms/static/js/base.js

 require(["jquery", "underscore", "gettext", "js/views/feedback_notification", "js/views/feedback_prompt",
-         "jquery.ui", "jquery.timepicker", "jquery.leanModal", "jquery.form"],
+         "jquery.ui", "jquery.timepicker", "jquery.leanModal", "jquery.form", "jquery.smoothScroll"],
     function($, _, gettext, NotificationView, PromptView) {
 
 var $body;