Board Thread:Support Requests - Getting Technical/@comment-31246436-20161221204954

I have seen on Star Wars wiki these icons at the top of the article in the same row as the edit and talk buttons. I am trying to figure out how they did that, but so am not successful. It looks really complicated (until I find that one missing piece to the puzzle...). I know it placed on a page using Template:Eras. Just how can I do the same or similar thing on my wiki? 