Issue 3816 - Add hidden toggle for the new options page

lib/notificationHelper.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2016 Eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 113 matching lines @@
   switch (activeButtons[buttonIndex].type)
   {
     case "link":
       ext.pages.open(Utils.getDocLink(activeNotification.links[buttonIndex]));
       break;
     case "open-all":
       openNotificationLinks();
       break;
     case "configure":
       Prefs.notifications_showui = true;
-      ext.showOptions(function(page)
+      ext.showOptions(Prefs["new_options_page"], function(page)

[Sebastian Noack, 2016/05/12 12:35:20]

Besides, duplicating logic, this also has the effect that when bringing up the
options page through the Chrome UI, you'd still always get the old options page.

In order to solve this we could instead make the old options page redirect to
new-options.html. This will keep the logic in one place, and works regardless
how the options page is brought up. The only downside is that you cannot open
the old and new options page side by side then. However, if that is necessary,
it can be worked around by supporting a query string parameter that if given
will bypass the redirect.

       {
         page.sendMessage({
           type: "app.respond",
           action: "focusSection",
           args: ["notifications"]
         });
       });
       break;
     case "question":
       NotificationStorage.triggerQuestionListeners(activeNotification.id, buttonIndex == 0);
@@ skipping 126 matching lines @@
   let methods = displayMethods[notificationType] || defaultDisplayMethods;
   return methods.indexOf(method) > -1;
 };
 
 ext.pages.onLoading.addListener(page =>
 {
   NotificationStorage.showNext(stringifyURL(page.url));
 });
 
 NotificationStorage.addShowListener(showNotification);