Dashboard accessible to non admin users

[nhinze]

The dashboard is accessible to non-admin users by typing in the URL:

/translation_center/dashboard

I used the following to restrict the admin users:

def can_admin_translations?
self.email == 'admin@mydomain.com'
end

The non-admin users cannot accept translations as expected and the the "Dashboard" link is not visible. However, if a user types in the "/translation_center/dashboard" URL, the dashboard is still accessible to them.