Linear click type OneTouch

[L-Mustang]

Implements a new LinearClickType called OneTouch.

OneTouch works similar to DCS: simply clicking anywhere on the controller cycles through its states.

Because this ClickType is incompatible with the Linear Potentiometer, I created an additional ClickType enum called LinearClickTypeDirectional. OneTouch does not provide any directional input, thus being incompativle with the Linear Potentiometer.

I have cross-checked the functionality of the changed controls to make sure that they remain the identical.

I have paid special attention to make sure that a Linear Potentiometer saved with a LinearClickType member is correctly parsed by the XML parser into a Linear Potentiometer with a LinearClickTypeDirectional member. This is possible because LinearClickTypeDirectional is identical to the previous LinearClickType.

[BlueFinBima]

@Lord-Mustang Thanks for the PR and sorry it has taken me so long to get around to reviewing and testing this.

I think the operation of the new mode is a little "odd" in some circumstances. Using the example of a three-way toggle, OneTouch follows the sequence 1-2-3-1-2-3. Surely this should operate in the order 1-2-3-2-1 ? I was also unable to get any sensible interaction from a rocker I tried (ie mon-on-mom) touching only made the rocker go from position 2 to 3 and I could not get it to go to position 1.

I can certainly see benefits from this for a simple toggle, but I'm left being unconvinced about the applicability for controls with more than two positions.

Possibly I am misunderstanding something, or using it incorrectly so I am very interested in your thoughts about my observations.