Since enabling pinch-to-zoom in iOS (eae22548de), there was an issue with inputs: Safari auto-zooms inputs with font-size under 16px. Now zooming will be disabled while focus is on an input.
This commit also removes a) a lightbox zoom-enabling event (no longer needed) and b) a comment about iOS zoom issues.
on iOS 10 behavior of zoom restriction has changed.
This does not disable zooming on iOS 10 but it DOES stop it from randomly
zooming when you are composing
