Barcode scanner improvements:
• Barcodes are only captured inside the highlighted box, so they can't be cut off at the edge of the photo
• Capture photos are saved at full resolution with less compression
• Now reads barcodes printed in reverse (white bars on a dark background)
• Camera focuses more reliably before capturing
• Captures confirm with a click as well as a vibration
• Tap a barcode's thumbnail to view its photo full screen with the barcode outlined, and delete it if unusable