Remove unused Url#archive! method
Remove unused archive highlight for URL list

We won't have this state any more, so we don't need its styling.
Rename the archive button class to "cancel"
Remove more references to the "archive" state
Remove unused #destiny_button helper
Rename "scrape" state to "finished"
Rename "unsure" state to "unfinished"
Replace mentions of imaginary "redirected" state
Use a link instead of a <button> for the cancel button