Like the Ultrathin Keyboard Cover for current iPads, the Ultrathin Keyboard mini elegantly combines three features in a single, impressively thin accessory: it has a metal bottom that serves as a protective cover for the iPad’s screen, a battery-powered plastic wireless keyboard, and a narrow tray that holds the iPad on a laptop screen-like recline when you’re typing. Thanks to an Apple Smart Cover-styled magnetic hinge on its edge, it…