GitLab

Add boards controller to issue nav item

#### What does this MR do?
Adds active state to top level nav

Before: 
![Screen_Shot_2016-08-18_at_7.56.56_PM](/uploads/c5db0e9e077f0970b6b7b7d8d7a08147/Screen_Shot_2016-08-18_at_7.56.56_PM.png)

After:   
![Screen_Shot_2016-08-18_at_7.56.10_PM](/uploads/6b46e6f093c02fb44e25cf6952638a5b/Screen_Shot_2016-08-18_at_7.56.10_PM.png)


See merge request !5883