Bug 823446 - Fix 'Services.appshell', should be 'Services.appShell' (documentation was wrong). r=philipp

calendar/resources/content/calendarService.js

@@ -116,7 +116,7 @@ ICALContentHandler.prototype = {
         if (w) {
             w.focus();
         } else {
-            w = Services.appshell.hiddenDOMWindow;
+            w = Services.appShell.hiddenDOMWindow;
 
             let args = {};
             args.channel = channel;