GIF unfavorite undo option

Since it's very easy to accidentally unfavorite a GIF you never wanted to, instead of disappearing there could be a mostly opaque grey mask over the GIF with text that says “GIF unfavorited” and a button that says “Undo” under it. (only mostly opaque so you can see what gif it was) The box could be there for about one minute if you close the GIF pop-up or until you close it if you don't.