* HyperchargePaymentWpf
 * @version 2.0.5 / add Purchase On Account - Payolution / 2014-07-22
 * @version 2.0.6 / validate AGB check / 2014-08-08
 * @version 2.0.7 / avoid double click for WPF too + get client's birthday as default value + fix update() issue / 2014-08-11