Various clipboard barcode fixes
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Roll back support for remembering barcodes. It is likely much unused, and the kf5->6 migration has re-numbered the enum values, so users will be in for a unpleasant surprise
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Drop showing 1d barcodes, it is unlikely to be used. They also only work for very limited data
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Use the word "Barcode" rather than "QR Code", given multiple formats allowed
Edited by Nate Graham