fix: snackbar sucess messages

app/lib/widgets/main_layout.dart

@@ -191,8 +191,7 @@ class _MapContainerWidgetState extends State<MapContainerWidget> {
                                           ),
                                           child: const Text("Export JSON"),
                                           onPressed: () {
-                                            Navigator.of(context).pop();
-                                            // Show progress indicator
+                                            // Close bottom sheet before displaying progress bar
                                             showProgressIndicator(context);
 
                                           },
@@ -294,6 +293,7 @@ class _MapContainerWidgetState extends State<MapContainerWidget> {
   }
 }
 
+// Saves all measurements to a file on the users mobile device
 Future<void> _exportIceData() async {
   final directory = await getExternalStorageDirectory();
   final file = File('${directory?.path}/ice_data_$selectedLake.json');
@@ -306,7 +306,6 @@ Future<void> _exportIceData() async {
 }
 
 
-
 // Display a progress indicator while JSON data is being downloaded
 void showProgressIndicator(BuildContext context) {
   BuildContext? dialogContext;
@@ -333,9 +332,8 @@ void showProgressIndicator(BuildContext context) {
   );
 
   // Ensure that the progress indicator runs for at lest 1 second
-  // before exporting the data
-  Future.delayed(const Duration(milliseconds: 1000), () {
-    try {
+  Future.delayed(const Duration(seconds: 1), () {
+    try { // Download JSON data
       _exportIceData();
       ScaffoldMessenger.of(context).showSnackBar(
         const SnackBar(content: Text('Downloaded ice data as JSON')),
@@ -349,6 +347,7 @@ void showProgressIndicator(BuildContext context) {
         // Add 2 second delay before closing the dialog
         Future.delayed(const Duration(seconds: 2), () {
           Navigator.of(dialogContext!).pop();
+          Navigator.of(context).pop();
         });
       }
     }