SpitfireLFMkIX Input Tweaks

Changes precision/step of various inputs - makes them easier to use when using joystick buttons instead of analog axis.

NOTE: You may need to rebind rudder trim/gun range/gunsight dim controls after installing this mod.

v 0.9.0

Changes
- rudder trim speed from 1.0 to 0.1
- gun range and target size from 1.0 to 0.2
- gunsight dim from 1.0 to 0.2