Open cash drawer when appropriate #20

Whenever a transaction involving cash or check is finished, NickelBridge should be asked to open the cash drawer.

There should also be a button in "Manage" on the POS screen to open the drawer.

Whenever a transaction involving cash or check is finished, NickelBridge should be asked to open the cash drawer. There should also be a button in "Manage" on the POS screen to open the drawer.