Added the device editor mocking to the database code.
Wrote code for hooking up freshly connected receipt/kitchen printers.
Made the various editor dialogs return to the Manager screen when closed.
Did the previous commit a slightly different way.
Implemented the Return to Log In Screen option in the Manager screen. This is needed for implementing the Other Settings.
Added tax and manager password to the mock database.
Wrote in the taxation into orders.
Some cleanup and completeness fixes.
Made the Other Settings options actually work.
Hooked up the Manager password to the Login window.