LP#1461739: Added paging controls to the bottom of autogrids

LP#1461739: Added paging controls to the bottom of autogrids

This is a repatch of LP#1461739: Paging controls needed at the bottom
of the web client patron search.

The actions drop-down menu now appears on the Record Buckets,
and Copy Buckets pages.

staff/services/grid.js was updated to account for the new
*Top and *Bottom variables (e.g., gridColumnPickerIsOpenTop).

To test the fix for this bug
  [1] Under Cataloging choose Record Buckets.
  [2] Under Cataloging choose Copy Buckets.

Signed-off-by: Victoria Lewis <vlewis@catalystitservices.com>
	modified:   Open-ILS/src/templates/staff/share/button_bar.tt2
	modified:   Open-ILS/src/templates/staff/share/t_autogrid.tt2
	modified:   Open-ILS/web/js/ui/default/staff/services/grid.js