partial fixes for 32347, 30536, 41120

suite/browser/hiddenWindow.xul

@@ -21,7 +21,7 @@ Rights Reserved.
 Contributor(s): ______________________________________. -->
 
 <?xul-overlay href="chrome://navigator/content/navigatorOverlay.xul"?>
-<?xul-overlay href="chrome://global/content/tasksOverlay.xul"?>
+<?xul-overlay href="chrome://communicator/content/tasksOverlay.xul"?>
 
 <!-- hiddenwindow is a "minimal" XUL window intended for creating the,
      er, hidden window.  This window is never shown, but on platforms