Add options for different Analog Stick modes

[thearst3rd]

This removes my half-baked "ModAnalogRange" and replaces it with a better (hopefully 😄) system. The current modes are:

• Normal - It does not modify the analog values at all.
• Modded - This multiplies all analog values by sqrt(2) and them clamps them back into range. This feels much better than my other more complex version. There is less fine-grain control at slower speeds compared to the old method, but I think it's an improvement.
• 8-way - This replaces all analog movement with 8 discrete pie slices which move at full speed in the 4 cardinal + 4 diagonal directions. It looks like the following chart, where different colors represent different directions.
  

I also added in another mode, but it didn't work very well so it is not accessible through the menu. It is "Enforce Unmodded" - the theory is that it takes values and clamps it to have a maximum range of 1.0, like an original unmodded 360 controller. But when going forwards, if your aim is even slightly off of perfect, then you'll only go forwards at 99% speed. So this needs tuning before it gets fully added.