QT: minimum amount calculation for "Send" warning
QT: minimum amount calculation for "Send" warning

For further detail see: https://github.com/zathras-crypto/mastercore/issues/17#issuecomment-74415174

mastercoin-MSC/mastercore,mastercoin-MSC/mastercore,mastercoin-MSC/mastercore,mastercoin-MSC/mastercore,mastercoin-MSC/mastercore