Proper support for light and dark mode.

Added back support for iOS 15

Supports landscape orientation.

Fully re-written to support latest iOS versions.

Validated with iOS 4
Added iAds

- Gauge up to 50
- Improve calculation precision
- Tested for iPhone OS 3.0

By popular request, this version goes up to AWG 40 and has increased precision (of 6 decimal digits) in the dimensions displayed.
It also includes the fix of a typo and improved responsiveness of the i button.