Prefix + Caps lock

[TomMettam]

It's common for users of systems with barcode scanners to accidentally enable caps-lock. If a string of characters is used as the "prefix" (rather than numbers or symbols) this causes the scan to be missed.

I understand there may be a need for case-sensitive prefixes, however it would be helpful this was configurable (and, for safety, I'd suggest that it should be case-insensitive by default)

[serhalp]

Thanks for the feedback! We'd definitely welcome a PR for this. 👍