private void SaveAccountMenuItem_Click(object sender, RoutedEventArgs e)
 {
     if (saveAccountWindow == null)
     {
         saveAccountWindow         = new SaveAccountWindow();
         saveAccountWindow.Closed += (_sender, _e) => { saveAccountWindow = null; };
     }
     saveAccountWindow.Left = this.Width / 2 + this.Left - saveAccountWindow.Width / 2;
     saveAccountWindow.Top  = this.Height / 2 + this.Top - saveAccountWindow.Height / 2;
     saveAccountWindow.Show();
 }
 private void ClearAccountMenuItem_Click(object sender, RoutedEventArgs e)
 {
     SaveAccountWindow.RemoveSavedAccount();
 }