Remove white space between nav items

Fixes annoying white space between items on navigation bars.

Before
![Screen_Shot_2016-12-13_at_6.06.11_PM](/uploads/605b49822f93168901bedc5ceb6490a3/Screen_Shot_2016-12-13_at_6.06.11_PM.png)

After
![Screen_Shot_2016-12-13_at_6.06.22_PM](/uploads/5c2e6432be477deaaf544cf81ec493e9/Screen_Shot_2016-12-13_at_6.06.22_PM.png)

See merge request !8078