Fix going back to /reports page on mobile.
Fix going back to /reports page on mobile.

Record the original page we're at, so that when we go back to it,
we go back to the right one (the only difference between /around
and /reports being the full screen map of /around).

mhalden/fixmystreet,dracos/fixmystreet,altinukshini/lokalizo,mhalden/fixmystreet,mhalden/fixmystreet,altinukshini/lokalizo,dracos/fixmystreet,dracos/fixmystreet,altinukshini/lokalizo,rbgdigital/fixmystreet,altinukshini/lokalizo,rbgdigital/fixmystreet,rbgdigital/fixmystreet,rbgdigital/fixmystreet,altinukshini/lokalizo,dracos/fixmystreet,rbgdigital/fixmystreet,mhalden/fixmystreet,altinukshini/lokalizo,mhalden/fixmystreet,dracos/fixmystreet,dracos/fixmystreet,mhalden/fixmystreet,rbgdigital/fixmystreet