New betas have been released for iOS 11, tvOS 11 watchOS 4 and macOS 10, and developer Guilherme Rambo has discovered a couple of gems amid all the bug fixes and minor improvements. In ios 11, Rambo found one video that seems to show off a new swipe-up gesture used to activate the iOS app switcher and another that runs through changes to the lock screen interface. Swiping down brings the lock screen up from anywhere in the operating system, and while…