userpage: add/edit discord

works identically to on the form, would like to eventually factor out
the discord/telegram/matrix verif stuff so it can be shared between the
two pages though.

ts/form.ts

@@ -1,6 +1,6 @@
 import { Modal } from "./modules/modal.js";
 import { notificationBox, whichAnimationEvent } from "./modules/common.js";
-import { _get, _post, toggleLoader, addLoader, removeLoader, toDateString } from "./modules/common.js";
+import { _get, _post, toggleLoader, addLoader, removeLoader, toDateString, DiscordInvite } from "./modules/common.js";
 import { loadLangSelector } from "./modules/lang.js";
 import { initValidator } from "./modules/validator.js";
 
@@ -91,11 +91,6 @@ if (window.telegramEnabled) {
     };
 }
 
-interface DiscordInvite {
-    invite: string;
-    icon: string;
-}
-
 var discordVerified = false;
 if (window.discordEnabled) {
     window.discordModal = new Modal(document.getElementById("modal-discord"), window.discordRequired);