Description of problem:

The background and text colors of the "User management" and "Logout" options in the top right corner of the page are white, making the buttons invisible

Version-Release number of selected component (if applicable): upstream

How reproducible: Always

Steps to Reproduce:
1. Login into tackle and click the user name in the top right corner of the page

Actual results: 

The dropdown is expanded but no options are shown 

Expected results:

There should be two available options displayed: "User management" and "Logout"

Additional info: