Configurable 2 position switch.

Property: (default value)

- Normally Closed: (no)
   State with button not pushed.

- Double Throw: (no)
   Yes: 2 throws per pole.
   No: 1 throw per pole.

- Poles: (1)
   Number of poles controlled by this switch.

- Key: ()
   Character shown in the button.
   Can be activated by keyboard in your PC.
