Jade2

- Added a feature to redeem Promo Codes on the POS system. - Added a feature to implement menu categories that are only accessible when the bill has a member. - Improved the feedback for the login function. - Improved database cleanup. - Improved the system's ability to detect mismatched bills. - Fixed some bugs related to Z-reading. - Fixed a bug related to integration with Jade2Display when some items had both a price override and a discount. - Fixed a bug related to transferring items from tables with members. - Fixed a bug related to completing a transaction with more than 2 of the same payment type. - Fixed a bug related to table printing for takeaway orders - Fixed a bug related to image printing for specific course items on dot-matrix printers.