Description of problem:
There is only a white space where navbar should be.

How reproducible:
with katello

Steps to Reproduce:
1. Log into foreman
2. Go to a content-views
3. Drill into the cvv (contentview -> cv-name -> version #)
4. Click back button

Actual results:
White background that you can't exit and stuck in that submenu.

Expected results:
Back stays the same and can access the side menu.

Additional info:
If you hit refresh, it'll bring it back to old state.