ui: Make going back minimize the app

lib/ui/pages/share_selection.dart

@@ -1,7 +1,9 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:get_it/get_it.dart';
+import 'package:move_to_background/move_to_background.dart';
 import 'package:moxxyv2/shared/constants.dart';
+import 'package:moxxyv2/ui/bloc/navigation_bloc.dart' as navigation;
 import 'package:moxxyv2/ui/bloc/sendfiles_bloc.dart';
 import 'package:moxxyv2/ui/bloc/share_selection_bloc.dart';
 import 'package:moxxyv2/ui/constants.dart';
@@ -24,9 +26,19 @@ class ShareSelectionPage extends StatelessWidget {
 
     return WillPopScope(
       onWillPop: () async {
-        context.read<ShareSelectionBloc>().add(ResetEvent());
+        GetIt.I.get<ShareSelectionBloc>().add(ResetEvent());
 
-        return true;
+        // Put the app back into the background...
+        await MoveToBackground.moveTaskToBack();
+        // ...and navigate to the conversations page
+        GetIt.I.get<navigation.NavigationBloc>().add(
+          navigation.PushedNamedAndRemoveUntilEvent(
+            const navigation.NavigationDestination(conversationsRoute),
+            (_) => false,
+          ),
+        );
+
+        return false;
       },
       child: BlocBuilder<ShareSelectionBloc, ShareSelectionState>(
         builder: (context, state) => Scaffold(