Show subscription setup for domain adding

src/js/client.js

@@ -401,6 +401,7 @@ angular.module('Application').service('Client', ['$http', '$interval', '$timeout
 
         // => This is just for easier testing
         // this._config.features.userMaxCount = 5;
+        // this._config.features.domainMaxCount = 1;
         // this._config.features.externalLdap = false;
         // this._config.features.privateDockerRegistry = false;
         // this._config.features.branding = true;