fix minor bug around assetsend and assetallocationsend amount ranges
fix minor bug around assetsend and assetallocationsend amount ranges

were not using the proper asset amountfromvalue and valuefromamount functions


Former-commit-id: cccb4ee027ab6e392d68ec481fd99668396eaba3
syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin