Request: Allow adding/modifying filtering URLs to a saved code.

[teknowledgist]

While I know I can rename a saved code, I can't change the URL it was created for even though the MFA might continue to work for a site that changed its URL. Also, some sites might have multiple URLs where the MFA code can be entered. It would be nice if entries could have multiple URLs to filter them rather than having to scroll through the big list because the URL has changed.

Thanks for a great extension!