Allow any device rotation

lib/main.dart

@@ -62,8 +62,6 @@ class _MainState extends State<Main> {
   void initState() {
     Jiffy.setLocale("de");
 
-    SystemChrome.setPreferredOrientations([DeviceOrientation.portraitUp, DeviceOrientation.portraitDown]);
-
     AccountData().waitForPopulation().then((value) {
       Provider.of<AccountModel>(context, listen: false)
           .setState(value ? AccountModelState.loggedIn : AccountModelState.loggedOut);