Issue Description

I tried logging in via the login form at /session/new. After logging in, I was forwarded to the same login form again. That is confusing.

Expected Result

I'd expect to not see a log in form after logging in. I'd expect to be taken back to the SR (or other page) that I came from, and if that is not possible, I should be forwarded to /user/show/[myname].

How to Reproduce

1. Make sure you're logged out of OBS
2. Go to a random SR, e.g.: https://build.opensuse.org/request/show/178397
3. Scroll down to the "login" link in the comments section and click that
4. You are now on a login form, log in through that.

Result:

• The page header shows that you are logged in
• You are still on the same login form that asks you to "Please Log In"