Added toggling of grid paging with GET param.
Added toggling of grid paging with GET param.

refs #1817

Added the ability to turn grid paging on and off via a GET parameter to make it
easier to test comparative browser memory use.

michal-ruzicka/archivematica,eckardm/archivematica,sevein/archivematica,sevein/archivematica,sevein/archivematica,sevein/archivematica,artefactual/archivematica,artefactual/archivematica,artefactual/archivematica,michal-ruzicka/archivematica,eckardm/archivematica,eckardm/archivematica,michal-ruzicka/archivematica,michal-ruzicka/archivematica,artefactual/archivematica,eckardm/archivematica