#40 added 'rate app' button

lib/view/pages/more/overhang.dart

@@ -1,5 +1,7 @@
 
 import 'package:flutter/material.dart';
+import 'package:in_app_review/in_app_review.dart';
+import 'package:marianum_mobile/widget/infoDialog.dart';
 import 'package:persistent_bottom_nav_bar_v2/persistent-tab-view.dart';
 
 import '../../../widget/ListItem.dart';
@@ -38,13 +40,33 @@ class Overhang extends StatelessWidget {
             trailing: const Icon(Icons.arrow_right),
             onTap: () => showDialog(context: context, builder: (context) => const SelectShareTypeDialog())
           ),
+          FutureBuilder(
+            future: InAppReview.instance.isAvailable(),
+            builder: (context, snapshot) {
+              if(!snapshot.hasData) return const SizedBox.shrink();
+
+              return Visibility(
+                visible: snapshot.requireData,
+                child: ListTile(
+                  leading: const CenteredLeading(Icon(Icons.star_rate_outlined)),
+                  title: const Text("App Bewerten"),
+                  onTap: () {
+                    InAppReview.instance.openStoreListing(appStoreId: "6458789560").then(
+                      (value) => InfoDialog.show(context, "Vielen Dank!"),
+                      onError: (error) => InfoDialog.show(context, error.toString())
+                    );
+                  },
+                ),
+              );
+            },
+          ),
           ListTile(
             leading: const CenteredLeading(Icon(Icons.feedback_outlined)),
             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()),
-          )
+          ),
         ],
       ),
     );