fix for ORDER HISTORY's time shown as NaN.NaN (#678)
fix for ORDER HISTORY's time shown as NaN.NaN (#678)

bitsuperlab/web_play,dacsunlimited/web_play,bitsuperlab/web_play,dacsunlimited/web_play,bitshares/web_wallet,dacsunlimited/web_play,bitshares/web_wallet,bitsuperlab/web_play