do not show register button if auction is closed (closes #3737);
do not show register button if auction is closed (closes #3737);

mzikherman/force,xtina-starr/force,erikdstock/force,anandaroop/force,oxaudo/force,erikdstock/force,eessex/force,artsy/force,damassi/force,eessex/force,erikdstock/force,anandaroop/force,kanaabe/force,damassi/force,yuki24/force,joeyAghion/force,dblock/force,xtina-starr/force,artsy/force,dblock/force,izakp/force,kanaabe/force,kanaabe/force,yuki24/force,cavvia/force-1,artsy/force-public,erikdstock/force,anandaroop/force,oxaudo/force,kanaabe/force,eessex/force,yuki24/force,cavvia/force-1,oxaudo/force,artsy/force,kanaabe/force,dblock/force,joeyAghion/force,damassi/force,izakp/force,mzikherman/force,izakp/force,eessex/force,xtina-starr/force,cavvia/force-1,oxaudo/force,mzikherman/force,anandaroop/force,damassi/force,yuki24/force,joeyAghion/force,xtina-starr/force,izakp/force,mzikherman/force,artsy/force-public,cavvia/force-1,joeyAghion/force,artsy/force