nanoDLP

It would be nice to provide the user with the ability to disable the stepper motor with a simple button in the Z axis interface page. This would be beneficial for manual calibrations of the platen and / or disabling the stepper motor when it will not be used for longer periods of time.

We are running over step direction and enable pins via the GPIO. Just need the enable pin to have the ability to be flipped (without going to the setup page)