AMBARI-12067 Changed configs popup is not shown for YARN and MR2. (ababiichuk)

ambari-web/app/controllers/main/service/info/configs.js

@@ -325,7 +325,7 @@ App.MainServiceInfoConfigsController = Em.Controller.extend(App.ConfigsLoader, A
       return null;
     }
     var hash = {};
-    this.get('stepConfigs')[0].configs.forEach(function (config) {
+    this.get('selectedService.configs').forEach(function (config) {
       hash[config.get('name')] = {value: config.get('value'), overrides: [], isFinal: config.get('isFinal')};
       if (!config.get('overrides')) return;
       if (!config.get('overrides.length')) return;