Delete favs about forget

[brnltn]

It would be great to add this feature if we want a tool that cleans all our activity 👍

[codl]

bumping as this was requested again via email

[codl]

The issue here is that neither Twitter nor Mastodon returns info on when a status has been favourited. Also twitter has the same behaviour as with the user timeline where it won't let you go all the way back, and until #64 is solved (which I have had no motivation to do 😩) this feature would be useless for users, both existing and new, using a twitter account. Unless I am mistaken, I believe Mastodon doesn't have this behaviour here either and will let you page through favourites all the way to the very first, so we can at least do something there.

While we can't get the "official" time of favouriting, we can cheat and start counting from the time we first see a fav. I think that would work well enough, provided there is some explanatory text next to the toggle.