support exponential format in /wallet/send
support exponential format in /wallet/send

MrStrong/Sia,ericflo/Sia,rivine/rivine,johnathanhowell/Sia,mnsl/Sia,MrStrong/Sia,Mingling94/Sia,ChrisSchinnerl/Sia,NebulousLabs/Sia,mharkus/Sia,ericflo/Sia,kustomzone/Sia,mharkus/Sia,NebulousLabs/Sia,rivine/rivine,ChrisSchinnerl/Sia,cyrozap/Sia,mtlynch/Sia,mnsl/Sia,mtlynch/Sia