Fix for Bug 7077 - Add system pref to control behavior of submitting empty barcode...

Fix for Bug 7077 - Add system pref to control behavior of submitting empty barcode field

Adds a new system preference, CircAutoPrintQuickSlip:

When an empty an empty barcode field is submitted in circulation
[ clear the screen | open a print quick slip window ].

Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>
Fixed a merge conflict with the updatedatabase.pl

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Another merge conflict resolved. Marked as Passed QA.

Signed-off-by: Paul Poulain <paul.poulain@biblibre.com>