iOS Developer Steve Troughton-Smith has tweeted about a new discovery of a one-handed keyboard mode hidden within the iOS code. Troughton-Smith notes that the code has been in place going as far back as iOS 8, although Apple has chosen for whatever reason to not actually implement it yet. It appears the left/right one-handed keyboard mode is designed to be activated by swiping from either edge of the screen, compressing the spacing of the normal keyboard…