Make help page localisable and make up to date

Closes https://github.com/ajayyy/SponsorBlock/issues/509

src/help.ts

@@ -1,8 +1,16 @@
+import Config from "./config";
 import { showDonationLink } from "./utils/configUtils";
 
+import Utils from "./utils";
+const utils = new Utils();
+
 window.addEventListener('DOMContentLoaded', init);
 
 async function init() {
+    utils.localizeHtmlPage();
+
+    await utils.wait(() => Config.config !== null);
+
     if (!showDonationLink()) {
         document.getElementById("sbDonate").style.display = "none";
     }