Optimize custom configuration

v2rayN/v2rayN/ViewModels/AddServer2ViewModel.cs

@@ -26,6 +26,7 @@ namespace v2rayN.ViewModels
         public ReactiveCommand<Unit, Unit> BrowseServerCmd { get; }
         public ReactiveCommand<Unit, Unit> EditServerCmd { get; }
         public ReactiveCommand<Unit, Unit> SaveServerCmd { get; }
+        public bool IsModified { get; set; }
 
         public AddServer2ViewModel(ProfileItem profileItem, Window view)
         {
@@ -128,7 +129,11 @@ namespace v2rayN.ViewModels
             if (ConfigHandler.AddCustomServer(ref _config, item, false) == 0)
             {
                 _noticeHandler?.Enqueue(ResUI.SuccessfullyImportedCustomServer);
-                _view.DialogResult = true;
+                if (!Utils.IsNullOrEmpty(item.indexId))
+                {
+                    SelectedSource = Utils.DeepCopy(item);
+                }
+                IsModified = true;
             }
             else
             {

v2rayN/v2rayN/ViewModels/MainWindowViewModel.cs

@@ -800,6 +800,7 @@ namespace v2rayN.ViewModels
                 {
                     subid = _subId,
                     configType = eConfigType,
+                    displayLog = false
                 };
             }
             else

v2rayN/v2rayN/Views/AddServer2Window.xaml.cs

@@ -44,7 +44,14 @@ namespace v2rayN.Views
         }
         private void btnCancel_Click(object sender, System.Windows.RoutedEventArgs e)
         {
-            this.Close();
+            if (ViewModel?.IsModified == true)
+            {
+                this.DialogResult = true;
+            }
+            else
+            {
+                this.Close();
+            }
         }
 
     }