Add a least liked thread filter

Much like best, newest and most recent, I would like to see the worst threads.

In example

http://boards.na.leagueoflegends.com/en/c/GD/YBuIQgp3-if-you-dont-gank-mid-in-1-minute-i-am-going-to-leave-the-game?show=flat

177 dislikes, please let me filter the content I WANT TO SEE