set delay in all future builders to 250ms

lib/presentation/views/main_menu/create_group_view.dart

@@ -55,7 +55,7 @@ class _CreateGroupViewState extends State<CreateGroupView> {
 
   void loadPlayerList() {
     _allPlayersFuture = Future.delayed(
-      const Duration(milliseconds: 400),
+      const Duration(milliseconds: 250),
       () => db.playerDao.getAllPlayers(),
     );
     suggestedPlayers = skeletonData;

lib/presentation/views/main_menu/groups_view.dart

@@ -35,7 +35,7 @@ class _GroupsViewState extends State<GroupsView> {
     super.initState();
     db = Provider.of<AppDatabase>(context, listen: false);
     _allGroupsFuture = Future.delayed(
-      const Duration(milliseconds: 400),
+      const Duration(milliseconds: 250),
       () => db.groupDao.getAllGroups(),
     );
   }

lib/presentation/views/main_menu/home_view.dart

@@ -27,7 +27,7 @@ class _HomeViewState extends State<HomeView> {
     _groupCountFuture = db.groupDao.getGroupCount();
 
     Future.wait([_gameCountFuture, _groupCountFuture]).then((_) async {
-      await Future.delayed(const Duration(milliseconds: 50));
+      await Future.delayed(const Duration(milliseconds: 250));
       if (mounted) {
         setState(() {
           isLoading = false;

lib/presentation/views/main_menu/statistics_view.dart

@@ -29,7 +29,7 @@ class _StatisticsViewState extends State<StatisticsView> {
     _playersFuture = db.playerDao.getAllPlayers();
 
     Future.wait([_gamesFuture, _playersFuture]).then((results) async {
-      await Future.delayed(const Duration(milliseconds: 200));
+      await Future.delayed(const Duration(milliseconds: 250));
       final games = results[0] as List<Game>;
       final players = results[1] as List<Player>;
       winCounts = _calculateWinsForAllPlayers(games, players);