fix code style fixes #335

- renames snackbar.dart
- fixes a wrong log

src/ui/flutter_app/lib/screens/game_page/game_page.dart

@@ -37,7 +37,7 @@ import 'package:sanmill/services/engine/native_engine.dart';
 import 'package:sanmill/services/storage/storage.dart';
 import 'package:sanmill/shared/dialog.dart';
 import 'package:sanmill/shared/picker.dart';
-import 'package:sanmill/shared/snack_bar.dart';
+import 'package:sanmill/shared/snackbar.dart';
 import 'package:sanmill/shared/theme/app_theme.dart';
 //import 'package:screen_recorder/screen_recorder.dart';
 import 'package:stack_trace/stack_trace.dart';

src/ui/flutter_app/lib/screens/game_settings/game_settings_page.dart

@@ -67,7 +67,7 @@ class GameSettingsPage extends StatelessWidget {
   void _setAiIsLazy(Preferences _preferences, bool value) {
     LocalDatabaseService.preferences = _preferences.copyWith(aiIsLazy: value);
 
-    debugPrint("$_tag aiMovesFirst: $value");
+    debugPrint("$_tag aiIsLazy: $value");
   }
 
   void _setAlgorithm(BuildContext context, Preferences _preferences) {

src/ui/flutter_app/lib/screens/rule_settings/rule_settings_page.dart

@@ -24,7 +24,7 @@ import 'package:sanmill/services/storage/storage.dart';
 import 'package:sanmill/shared/settings/settings_card.dart';
 import 'package:sanmill/shared/settings/settings_list_tile.dart';
 import 'package:sanmill/shared/settings/settings_switch_list_tile.dart';
-import 'package:sanmill/shared/snack_bar.dart';
+import 'package:sanmill/shared/snackbar.dart';
 import 'package:sanmill/shared/theme/app_theme.dart';
 
 part 'package:sanmill/screens/rule_settings/fly_piece_count_modal.dart';