Does anyone know if this bag comes with a detachable shoulder strap? The picture from Bloomies (attached) shows the bag with what looks like a detachable strap. However, the picture from Nordstrom (and everywhere else I've seen it- I've also attached Nordie's pic) does NOT have the strap. Also, if anyone has this bag, how big is it IRL? Does it fit a lot? I'm a really big bag person, so the more it fits, the better TIA!