Move defaults to constructor so they aren't lost if fixedFee is removed, make more efficient.
Move defaults to constructor so they aren't lost if fixedFee is removed, make more efficient.

srhoulam/openbazaar-desktop,OpenBazaar/openbazaar-desktop,jjeffryes/openbazaar-desktop,jashot7/openbazaar-desktop,srhoulam/openbazaar-desktop,OpenBazaar/openbazaar-desktop,OpenBazaar/openbazaar-desktop,jashot7/openbazaar-desktop,srhoulam/openbazaar-desktop,jjeffryes/openbazaar-desktop,jjeffryes/openbazaar-desktop,jashot7/openbazaar-desktop