fix UIAlertView test behavior
fix UIAlertView test behavior

you can't just do a removeFromSuperview, it adds a whole `UIWindow` hierarchy and breaks future functional tests.
earthrid/BubbleWrap,mattetti/BubbleWrap,andersennl/BubbleWrap,dam13n/BubbleWrap,hboon/BubbleWrap,fandor/BubbleWrap