Tweaks and fixes

• Deal / Substitute unit, a couple of quality of life changes
  • Add an icon to indicate which units are already on a deal
  • Add a make / model search filter
• Orderbook, added an advanced move function where you can move a part to a specific order #. (only if suppliers match)
• Payroll : STP export tweak. Was not sending the name of operator who authorised the export. Now fixed
• Calibrate barcode labels: add button wasn't work (prob hasn't work since 2019! I guess not many people ever used it). Now fixed.
• Move parts: added a couple of filter options to try and match on part description too