Tag alias: wideface <--> wide_face

Wideface (current) or wide face: you decide. All the other wide tags are two words, and the wiki doesn't limit the tag to some sort of Hidamari Sketch meme (if a meme is why it's one word).

Will do it with a space, I guess, even though nobody really uses the word that way. Mot of the time it's in reference to the Hidamari style, but I suppose there are some that are just wide faces, period.