Added barcode variables

We’ve introduced Orca Variables to make it easier to extract data from barcodes, add $GS1:GTIN or $HIBC:PCN as a default value and scan a UDI barcode (more info at Variables)

• Use new Exists in trigger to guide user input when an item exist in your sheet
• Use new Does not exist in trigger to guide user input when an item does not exist in your sheet
• Use new Notify me triggers to show dialogs and notifications based on user input

We also fixed a few UI issues.

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