This enables HIDAPI support for Steam Controller (Bluetooth only) and Steam Deck.
Note: while SteamDeck HIDAPI is enabled, it works best while in Desktop Mode and without Steam Client running in the background (will show the actual device name instead of "Steam Virtual Gamepad"). It may not support more advanced feature sets, and it only remains that case until Valve adds Motion Sensor passthru support to SDL2/SDL3 while using SteamInput.
Removing the scaling entirely beraks Sniper Rifle zoom. So: we're switching back to FOV Scaling, but now it'll be based on `PLAYER_DEFAULT_FOV` instead of `60.0f`. This now ensures tha
this changes mouse sensitiivity scale to mirror id Tech's Mouse Sensitivity Scale. This also makes it easier for Steam Input users (Steam Deck and Steam Controller) to use Gyro To Mouse/Flick Stick's Natural Sensitivity Scale
For some reason: this sourceport isn't using SDL Hints. this is very crucial inorder to implement features sets like Gyro Aiming. Thus: most of the important hints will be forcefully enabled while improving Contorller compatibility when using RawInput
AL2009man