Sub navigation

## What does this MR do?
Styles sub nav   
cc @dzaporozhets  @skyruler @jschatz1 

## What are the relevant issue numbers?
#18058 and #17983 

## Screenshots (if relevant)
![Screen_Shot_2016-06-03_at_12.10.26_PM](/uploads/8b948c32699a93ab0a390bda31e0e411/Screen_Shot_2016-06-03_at_12.10.26_PM.png)
![Screen_Shot_2016-06-03_at_12.10.34_PM](/uploads/241115c35d0618f3de739be9a670416d/Screen_Shot_2016-06-03_at_12.10.34_PM.png)

See merge request !4468