More information has been added to plugin payment methods

In V7Preview5 in methods Pay and PaySilently replaced several arguments.

Now the Pay method receives IPaymentItem paymentItem instead of Guid paymentTypeId. And the PaySilently method instead of Guid orderId, Guid paymentTypeId comes IOrder order, IPaymentItem paymentItem. Thus, when making a plugin payment, when iikoFront transfers control to one of the specified methods in the plugin, you can determine whether payment is made when closing an order or an advance payment is made: the IPaymentItem paymentItem property is available IsPrepay.