Fix redirect on image upload.
Fix redirect on image upload.

mysociety/popit,openstate/popit,mysociety/popit,Sinar/popit,mysociety/popit,Sinar/popit,mysociety/popit,openstate/popit,openstate/popit,Sinar/popit,openstate/popit,mysociety/popit,Sinar/popit