A new kind of voucher that allowing to keep the remaining amount of the voucher to use it later
A new parameter is defined at voucher level, that indicate if the voucher could keep its remaining amount (instead of sending to Credit note or debtor profit).
With a voucher that indicated "Reusable", when contact pays for their order which the amount less than the voucher amount, the remaining amount of the voucher is kept and could be used for next orders.
