Demo / Sleep / Simulation Mode

[cwallen93117]

A great feature would be a demo / Sleep / Simulation mode. I often want to leave the machine on to upload GCODE and/or practice routines and see how they work. Would be great if there was a button you could click which would disable all the motors such that you aren't leaving the high current flow to the motors and don't risk crashing the machine. Something similar to the demo one you have for customers.