[Bugfix - LOW] Added missing point recalculations

Users who vote on an answer that is turned into a comment do not get their points recalculated after the answer becomes a comment. Similar thing happens to the owner of the answer.

Another thing that is actually pending is having the votes zeroed for the new comment. I'm not 100% sure that is the idea because the core seems to be ready to allow voting on comments so maybe the intention is to turn those votes into comment votes.