bug 3093: Enhance placing of holds in the staff interface.

bug 3093: Enhance placing of holds in the staff interface.

This patch allows staff users to request reserves on multiple
items at one time.

Added checkboxes, select-all, clear-all, and place-hold button to
staff search results page.  Place-hold button will only appear if
the user has permission to place holds for others.  Item-level
Place-Hold button will not appear for multiple holds, nor will
the vertical detail menu.

Patron input page now shows multiple items, if applicable.

Hold confirmation page shows results for multiple items, if
applicable.  Those which cannot be reserved are highlighted and
are excluded from the reservation.  The reservation is placed at
the biblio number (i.e. next available) level.

Fixed display of item type.

Removed side menu for multiple items; removed item-oriented button for multiple items.

Signed-off-by: Galen Charlton <galen.charlton@liblime.com>