What version are you running?
master (dev) with Python 3.6
What's the URL of the page containing the problem?
http://localhost:8080/admin/

What steps will reproduce the problem?

Navigate to http://localhost:8080/admin/ and log in
After logging in, scroll down to the "Manage" section of the left navigation menu
Click on one of the green "+" icons to attempt to create a new user/repository/review group/etc.


What is the expected output? What do you see instead?
It adds in an extra /admin/ in the path. For example,

It takes you to

http://localhost:8080/admin/admin/db/scmtools/repository/
instead of

http://localhost:8080/admin/db/scmtools/repository/
What operating system are you using? What browser?
Ubuntu Linux, Firefox
Please provide any additional information below.
This appears to only happen with Python 3