[DONE] 6D (and probably others): Fix annoying af pt selection

[Marsu42]

Problem: With the 6D, apart from multicontroller up/down (which cannot replace the 7d/5d joystick) you need to use *both* wheels to get to the af point you want to select. For me, both methods aren't very quick, I rather liked the 60D method with the wheel simply rotating through all available af points (it's only 11/9+1 after all), in practice this is quicker than using multiple buttons or wheels.

Suggestion: Forward-port the 60D selection method to the wheels (or any other method of selection that is quicker than the current 6d method, I'm open to suggestions :-)).

Edit: I solved it myself, at least partially, by enabling the af pattern point selection... single-wheel navigation is still to be done: https://bitbucket.org/Marsu42/ml-pull1/commits/2daffdce2c0354bdb94924069f047a59bd3309dc