Add missing updates from the previous commit.

web/pgadmin/browser/server_groups/servers/templates/servers/servers.js

@@ -237,6 +237,8 @@ function($, _, S, pgAdmin, pgBrowser, alertify) {
           pgBrowser.serverInfo = pgBrowser.serverInfo || {};
           pgBrowser.serverInfo[data._id] = _.extend({}, data);
 
+          // Call added method of node.js
+          pgAdmin.Browser.Node.callbacks.added.apply(this, arguments);
           return true;
         },
         /* Reload configuration */

web/pgadmin/browser/server_groups/templates/server_groups/server_groups.js

@@ -10,6 +10,7 @@ function($, _, pgAdmin, Backbone) {
       label: '{{ _('Server Group') }}',
       width: '350px',
       height: '250px',
+      is_collection: true,
       Init: function() {
         /* Avoid multiple registration of menus */
         if (this.initialized)