Fix issue with large screens

lib/ui/dialogs/pick_file_dialog.dart

@@ -6,6 +6,7 @@ import 'package:comunic/utils/ui_utils.dart';
 import 'package:file_picker/file_picker.dart';
 import 'package:filesize/filesize.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter/rendering.dart';
 import 'package:image_picker/image_picker.dart';
 import 'package:mime/mime.dart';
 
@@ -197,6 +198,9 @@ class _BottomSheetPickOption extends StatelessWidget {
   @override
   Widget build(BuildContext context) => Container(
         height: 255,
+        child: Center(
+          child: ConstrainedBox(
+            constraints: BoxConstraints(maxWidth: 400),
             child: ListView.builder(
               itemCount: options.length,
               itemBuilder: (c, i) => ListTile(
@@ -205,5 +209,7 @@ class _BottomSheetPickOption extends StatelessWidget {
                 onTap: () => onOptionSelected(options[i].value),
               ),
             ),
+          ),
+        ),
       );
 }