The top item in the sidebar is hidden for me on Firefox 58 Mac: <img width="1380" alt="screenshot 2018-01-23 14 14 55" src="https://user-images.githubusercontent.com/1329102/35303746-e2760bec-0047-11e8-940b-2dc38dfd057d.png"> Looks like the navbar could use a `.pt-5` or something?
