Display "Follow" button missing for courses when user logged out

[dirkcuys]

When a user is not logged in, only the participate button is showing up. When the user is logged in, both the follow and participate buttons shows up.

Both buttons should show up whether or not the user is logged in. Verify that the redirects work when a user that is not logged in presses the "Follow" button, both for login and after login (this may be the reason why it doesn't show up currently?)