Fix a division by zero when calculating the upvote ratio in the votes tooltip. This could happen if the post had votes according to the post_votes table, but didn't have any votes according to the up_score and down_score. This should never happen, yet it did happen for post 2248039 and post 2959269.
Components
Components are used to encapsulate common UI widgets used throughout the site. This includes things like comments, tag lists, post thumbnails, paginators, and other things used repeatedly throughout the site. Components encapsulate a widget's HTML, CSS, and Javascript together so that all the code for a component is in a single place.
This uses the ViewComponent library.
Components are similar in concept to React components.