Add TOTP URL to device form

[MichielBijland]

#19: not all TOTP storage devices support qrcode scanning

[nnist]

When I try to enter the secret which is shown below the QR code into 1password in a OTP field, it returns an error. When I try to scan the QR code it works fine, and auto-fills the field with the following:
otpauth://totp/sandbox%3Asuperuser%40example.com?secret=37IQ5XDQZQ5ZTBPJXYHMZHTI3QGK6OQD&algorithm=SHA1&digits=6&period=30&issuer=sandbox
It looks like they expect a URL to be used when filling in the field manually.

It also seems like the secret which is currently shown is different from the one in the QR code. The one in the URL ends with 3QGK6OQD (32 chars) while the one in the secret ends with 0caf3a03 (40 chars, and looks like a hash).