Prevent popup of "USED" prompt when opening the form.
Allow QR's for all generations (won't work for injection, just for
sharing).
Remove ".wc6" from Import/Export buttons (translation file).
Importing gift from QR now type checks.
Using the Cache for CyberGadget removes any need for a code generator,
as the code generator had many holes (partial writes if data already was
correct); future games would be odd to balance.
