added bigger feedback dialog widget

lib/view/pages/overhang.dart

@@ -74,7 +74,7 @@ class Overhang extends StatelessWidget {
             title: const Text('Du hast eine Idee?'),
             subtitle: const Text('Fehler und Verbessungsvorschläge'),
             trailing: const Icon(Icons.arrow_right),
-            onTap: () => showDialog(context: context, barrierDismissible: false, builder: (context) => const FeedbackDialog()),
+            onTap: () => pushScreen(context, withNavBar: false, screen: const FeedbackDialog()),
           ),
         ],
       ),