Fixed most of the warnings

lib/widgets/servers_list/delete_modal.dart

@@ -13,9 +13,9 @@ class DeleteModal extends StatelessWidget {
   final Server serverToDelete;
 
   const DeleteModal({
-    Key? key,
+    super.key,
     required this.serverToDelete,
-  }) : super(key: key);
+  });
 
   @override
   Widget build(BuildContext context) {
@@ -34,14 +34,14 @@ class DeleteModal extends StatelessWidget {
           appConfigProvider.setSelectedScreen(0);
         }
 
-        showSnacbkar(
+        showSnackbar(
           appConfigProvider: appConfigProvider, 
           label: AppLocalizations.of(context)!.connectionRemoved, 
           color: Colors.green
         );
       }
       else {
-        showSnacbkar(
+        showSnackbar(
           appConfigProvider: appConfigProvider, 
           label: AppLocalizations.of(context)!.connectionCannotBeRemoved, 
           color: Colors.red

lib/widgets/servers_list/server_tile_functions.dart

@@ -50,14 +50,15 @@ void showDeleteModal({
   required BuildContext context,
   required Server server
 }) async {
-  await Future.delayed(const Duration(seconds: 0), () => {
+  await Future.delayed(const Duration(seconds: 0), () {
+    if (!context.mounted) return;
     showDialog(
       context: context, 
       builder: (context) => DeleteModal(
         serverToDelete: server,
       ),
       barrierDismissible: false
-    )
+    );
   });
 }
 
@@ -133,7 +134,7 @@ void connectToServer({
     process.close();
     if (!context.mounted) return;
     final appConfigProvider = Provider.of<AppConfigProvider>(context, listen: false);
-    showSnacbkar(
+    showSnackbar(
       appConfigProvider: appConfigProvider, 
       label: AppLocalizations.of(context)!.cannotConnect, 
       color: Colors.red
@@ -150,14 +151,14 @@ void setDefaultServer({
   if (!context.mounted) return;
   final appConfigProvider = Provider.of<AppConfigProvider>(context, listen: false);
   if (result == null) {
-    showSnacbkar(
+    showSnackbar(
       appConfigProvider: appConfigProvider, 
       label: AppLocalizations.of(context)!.connectionDefaultSuccessfully, 
       color: Colors.green
     );
   }
   else {
-    showSnacbkar(
+    showSnackbar(
       appConfigProvider: appConfigProvider, 
       label: AppLocalizations.of(context)!.connectionDefaultFailed, 
       color: Colors.red

lib/widgets/servers_list/servers_list.dart

@@ -16,13 +16,13 @@ class ServersList extends StatelessWidget {
   final double breakingWidth;
 
   const ServersList({
-    Key? key,
+    super.key,
     required this.context,
     required this.controllers,
     required this.onChange,
     required this.scrollController,
     required this.breakingWidth
-  }) : super(key: key);
+  });
 
   @override
   Widget build(BuildContext context) {

lib/widgets/servers_list/servers_list_item.dart

@@ -68,7 +68,7 @@ class _ServersListItemState extends State<ServersListItem> with SingleTickerProv
       decoration: BoxDecoration(
         border: Border(
           bottom: BorderSide(
-            color: Theme.of(context).colorScheme.surfaceVariant,
+            color: Theme.of(context).colorScheme.surfaceContainerHighest,
             width: 1
           )
         )