FIX: More missing RSVP imports

app/assets/javascripts/discourse/models/static-page.js.es6

@@ -1,5 +1,7 @@
 import EmberObject from "@ember/object";
 import { ajax } from "discourse/lib/ajax";
+import { Promise } from "rsvp";
+
 const StaticPage = EmberObject.extend();
 
 StaticPage.reopenClass({

app/assets/javascripts/discourse/models/topic.js.es6

@@ -20,6 +20,7 @@ import {
 } from "discourse-common/utils/decorators";
 import Category from "discourse/models/category";
 import Session from "discourse/models/session";
+import { Promise } from "rsvp";
 
 export function loadTopicView(topic, args) {
   const data = _.merge({}, args);