Joystick and Keyboard inputs not recognized in Linux

[chris-ali]

Joystick names and axes are read differently in Linux vs Windows, so ControlsConfig.json and input classes need to reflect this.

Also, keyboards cannot be read by jinput in Linux w/o root privileges or device config settings because of security mitigations:
https://stackoverflow.com/questions/4307143/using-keyboards-in-jinput-without-root-privileges

Likely need to pull out all inputs from simulation, handle them in JME and pass polled values and key events into simulation

[chris-ali]

Keyboard inputs in Linux Mint (and perhaps other distros) will not be read if the user is not part of the input group:

bulletmark/libinput-gestures#7

Adding the user to the input group, logging out, and then back in fixed the issue. Will update documentation accordingly.

Joystick input devices have a different name in Linux vs Windows, so most likely this will need to be addressed in the future with a controls configuration GUI