Added option to open FileViewer always with system dialog, enabled by default on iOS

lib/storage/base/settings.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:json_annotation/json_annotation.dart';
 
 import '../file/fileSettings.dart';
+import '../fileView/fileViewSettings.dart';
 import '../gradeAverages/gradeAveragesSettings.dart';
 import '../holidays/holidaysSettings.dart';
 import '../talk/talkSettings.dart';
@@ -23,6 +24,7 @@ class Settings {
   TalkSettings talkSettings;
   FileSettings fileSettings;
   HolidaysSettings holidaysSettings;
+  FileViewSettings fileViewSettings;
 
   Settings({
     required this.appTheme,
@@ -32,6 +34,7 @@ class Settings {
     required this.talkSettings,
     required this.fileSettings,
     required this.holidaysSettings,
+    required this.fileViewSettings,
   });
 
   static String _themeToJson(ThemeMode m) => m.name;