Separate free-look speed for up/down

[wisefox7524]

Fix / Support Camera API in SimConnect

The current SimConnact camera API is non functional in MSFS 2020. This is preventing 3rd party developers of camera add-ons like ChasePlane, X-Camera, FSRealistic, etc. to proceed with their development. Mark Ellis Stick and Rudder Studios

This was a feature in most of the 3rd party camera add-ons in the past