/// <summary>
/// Method to go back to the precedent page
/// Update the alerts in the same time
/// </summary>
/// <returns></returns>
public async Task GoBack()
{
UpdateAlerts();
BoardWindow page = new BoardWindow(UserServices, AlertServices, MaterialServices, ProductServices, MaterialsProductServices, SaleServices, await AlertServices.CountAlerts());
page.Show();
CurrentPage.Close();
}