AvatarthickleHouse Tour: A Soho Apartment That Blends Whimsical Colors With Antique Furnitureverified_publisherELLE DECOR - Kelsey KlossWhat's old is new in this exuberant yet sophisticated apartment designed by Sasha Bikoff. In the trendy Manhtattan neighborhood of SoHo, there flutters a young woman who interior designer Sasha Bikoff describes as, essentially, a human butterfly. "The first thing she said is, 'I love butterflies.' …