Fixed Simple Problem, that occured after migrating to new version.

Still WIP need to fix more Problems

lib/widgets/buttons/create_progress_button.dart

@@ -4,15 +4,17 @@ import 'package:time_progress_tracker/screens/progress_creation_screen.dart';
 class CreateProgressButton extends StatelessWidget {
   final String _heroTag = "createProgressBTN";
 
+  const CreateProgressButton({super.key});
+
   @override
   Widget build(BuildContext context) {
-    void _onButtonPressed() =>
+    void onButtonPressed() =>
         Navigator.pushNamed(context, ProgressCreationScreen.routeName);
 
     return FloatingActionButton(
       heroTag: _heroTag,
-      child: Icon(Icons.add),
-      onPressed: _onButtonPressed,
+      onPressed: onButtonPressed,
+      child: const Icon(Icons.add),
     );
   }
 }