Player Button
-------------
* This block is only available if both digilines and digistuff are loaded.

When pressed sends a digilines message with the name of the player that
pressed the button.

The first time the button is right clicked a form opens to set the
digilines channel. After that right click presses the button. The
digilines cannot be changed after its set.

UI

Channel - digilines channel of button.

When the button is pressed a digilines message is sent with the button's
channel in the form:
{
	action = "player",
	name = <player name>
}