Steps to reproduce
- Open some diff in page history
- Click "thank" button
- Click "Thank the user" confirmation button on shown page
- See page: "You successfully thanked the user for that edit"
End up sad because I have no where to go:
There should be some easy way or link to return back to diff from which you thanked.
There is no return link. So you have to click "back" button in your browser twice to go back.
Firefox 58, tested on Czech Wikipedia