Merge pull request #4248 from cpradio/add-classname-to-invite-topic-button

Added class name for invite topic button

app/assets/javascripts/discourse/views/invite-reply-button.js.es6

@@ -2,6 +2,7 @@ import ButtonView from 'discourse/views/button';
 import { iconHTML } from 'discourse/helpers/fa-icon';
 
 export default ButtonView.extend({
+  classNames: ['invite-topic'],
   textKey: 'topic.invite_reply.title',
   helpKey: 'topic.invite_reply.help',
   attributeBindings: ['disabled'],