Apple is positioning iOS 9.3 as a major update, as evidenced by its new iOS 9.3 Preview webpage. The upcoming update had its first beta release today, and Apple has decided to point out a few of the new features. The biggest addition is Night Shift, a new feature that automatically makes display colors warmer based on the device’s clock and geolocation — the colors become warmer at sunset in your location. Apple claims viewing the warmer colors…