Fix cross-thread error on AccoundSettings.Saved event

Source/LibationAvalonia/ViewModels/MainVM.Import.cs

@@ -68,7 +68,8 @@ namespace LibationAvalonia.ViewModels
 			MainWindow.Loaded += (_, _) =>
 			{
 				refreshImportMenu();
-				AccountsSettingsPersister.Saved += refreshImportMenu;
+				AccountsSettingsPersister.Saved += (_, _)
+				=> Avalonia.Threading.Dispatcher.UIThread.Invoke(refreshImportMenu);
 			};
 
 			AutoScanChecked = Configuration.Instance.AutoScan;
@@ -222,7 +223,7 @@ namespace LibationAvalonia.ViewModels
 			}
 		}
 
-		private void refreshImportMenu(object? _ = null, EventArgs? __ = null)
+		private void refreshImportMenu()
 		{
 			using var persister = AudibleApiStorage.GetAccountsSettingsPersister();
 			AccountsCount = persister.AccountsSettings.Accounts.Count;

Source/LibationWinForms/Form1.ScanManual.cs

@@ -16,7 +16,7 @@ namespace LibationWinForms
 		private void Configure_ScanManual()
         {
 			this.Load += refreshImportMenu;
-			AccountsSettingsPersister.Saved += refreshImportMenu;
+			AccountsSettingsPersister.Saved += (_, _) => Invoke(refreshImportMenu, null, null);
 		}
 
 		private void refreshImportMenu(object _, EventArgs __)