update: remove redundant scaffold key

app/lib/pages/default_page.dart

@@ -24,8 +24,6 @@ class _DefaultPageState extends State<DefaultPage> {
   late Future<List<Measurement>> markerListFuture;
   late Future<Uint8List> relationFuture;
 
-  final GlobalKey<ScaffoldMessengerState> _scaffoldMessengerKey = GlobalKey<ScaffoldMessengerState>();
-
   @override
   void initState() {
     super.initState();
@@ -85,7 +83,6 @@ class _DefaultPageState extends State<DefaultPage> {
   Widget build(BuildContext context) {
     return MaterialApp(
       home: Scaffold(
-        key: _scaffoldMessengerKey,
         appBar: AppBar(
           title: const Text('IceMap'),
           actions: [
@@ -113,8 +110,8 @@ class _DefaultPageState extends State<DefaultPage> {
                     'assets/icons/frozen.png', // Loading screen icon
                     // Icon from: https://www.flaticon.com/free-icons/cold-water"
                     color: lightBlue,
-                    width: 200,
-                    height: 200,
+                    width: 170,
+                    height: 170,
                   ),
                 ),
               );