config: start adding path parameters

to change the urls of the admin page, the my account page and of
invites. Seems to work, but need to check all the code over and test.

ts/admin.ts

@@ -11,6 +11,8 @@ import { _get, _post, notificationBox, whichAnimationEvent, bindManualDropdowns
 import { Updater } from "./modules/update.js";
 import { Login } from "./modules/login.js";
 
+declare var window: GlobalWindow;
+
 const theme = new ThemeManager(document.getElementById("button-theme"));
 
 window.lang = new lang(window.langFile as LangFile);
@@ -165,12 +167,12 @@ const defaultTab = tabs[0];
 window.tabs = new Tabs();
 
 for (let tab of tabs) {
-    window.tabs.addTab(tab.id, tab.url, null, tab.reloader);
+    window.tabs.addTab(tab.id, window.pages.Admin + "/" + tab.url, null, tab.reloader);
 }
 
 let matchedTab = false
-for (let tab of tabs) {
-    if (window.location.pathname.startsWith(window.URLBase + "/" + tab.url)) {
+for (const tab of tabs) {
+    if (window.location.pathname.startsWith(window.pages.Base + window.pages.Current + "/" + tab.url)) {
         window.tabs.switch(tab.url, true);
         matchedTab = true;
     }