votes: show votes when hovering over post score.

Make it so you can hover over a post's score to see the list of public
upvotes. Also show the upvote count, the downvote count, and the upvote
ratio.

app/controllers/post_votes_controller.rb

@@ -4,6 +4,7 @@ class PostVotesController < ApplicationController
   def index
     @post_votes = authorize PostVote.visible(CurrentUser.user).paginated_search(params, count_pages: true)
     @post_votes = @post_votes.includes(:user, post: [:uploader, :media_asset]) if request.format.html?
+    @post = Post.find(params.dig(:search, :post_id)) if params.dig(:search, :post_id).present?
 
     respond_with(@post_votes)
   end