tweak padding of invite panel on mobile
tweak padding of invite panel on mobile

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