We need a way to determine and display the current state of the pistons

It will likely be very difficult for the operator to tell whether pistons are in or out by looking at the robot. We don't want to try to pick up a hatch panel from the loading station with the piston out. At best it won't work. At worst we'll bend a piston. We need to get the piston into a known state as soon as the robot is enabled and keep the current state displayed to the operator.
