add support for multiple payment on a single accept offer

example:
https://masterchain.info/Address.html?addr=1LifmeXYHeUe2qdKWBGVwfbUCMMrwYtoMm&currency=TMSC
https://masterchain.info/btcpayment.html?tx=d09ffc8f6b41176dc5a63f3110574cc42fb9fa8668b696b63b516bc0206001df&currency=TMSC