[DAEF-255] clean formatted amount value before passing it to bignumber again
[DAEF-255] clean formatted amount value before passing it to bignumber again

input-output-hk/daedalus,input-output-hk/daedalus,input-output-hk/daedalus,input-output-hk/daedalus,input-output-hk/daedalus,input-output-hk/daedalus