Tracking sheet updates

- Removed the user login requirement
- Removed the username from the temp folder created for saving the barcode images
- Formatted the Imaging Progress table to prevent the rows from overflowing
- Added a checksum to the barcode (replacing the previous library-generated checksum being used)

Created a new Track_Item_mySobekViewer - this acts as the input form for reading the scanned barcodes and updating the relevant tracking info