I Accidentally clicked "ignore all signatures" when trying to block one particular signature (badly designed ui and no prompt to ask if I am sure!) and now I can find no way to undo it... Can anyone please tell me how to undo this as i don't seem to have an option... Thanks!

Perhaps the option to block all signatures can be made a bit safer too?

found this in ignore preferences. It wasn't showing up when browsing from my phone, probably some kind of responsive thing.

It might still be better to have an "are you sure" prompt on this, though :)