If you build this patch from the idea that is good but I think it's better and more convenient if you add it at two places: top right corner and bottom right corner. 

Reason: Currently forum has other buttons at those places and if you add one more, you should add it at both places. Convenience for sure, as I don't have to scroll down to the bottom, just to ignore a topic. I would like to do it with either at top or bottom.