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/typings/d.ts

@@ -12,8 +12,19 @@ interface ArrayConstructor {
     from(arrayLike: any, mapFn?, thisArg?): Array<any>;
 }
 
-declare interface Window {
-    URLBase: string;
+declare interface PagePaths {
+    // The base subfolder the app is hosted on.
+    Base: string;
+    // The subdirectory this bit of the app is hosted on (e.g. admin is usually on "/", myacc is usually on "/my/account")
+    Current: string;
+    // Those for other pages
+    Admin: string;
+    MyAccount: string;
+    Form: string;
+}
+
+declare interface GlobalWindow extends Window {
+    pages: PagePaths;
     modals: Modals;
     cssFile: string;
     availableProfiles: string[];
@@ -25,6 +36,7 @@ declare interface Window {
     matrixEnabled: boolean;
     ombiEnabled: boolean;
     jellyseerrEnabled: boolean;
+    pwrEnabled: boolean;
     usernameEnabled: boolean;
     linkResetEnabled: boolean;
     token: string;