ui.circ.suppress_checkin_popups disables dialog prompts during check-in, but in the...

ui.circ.suppress_checkin_popups disables dialog prompts during check-in, but in the case print slip dialogs, it should still print the slips if the Auto-Print Hold and Transit Slips checkbox is toggled on (the action is still occuring).  However, only the dedicated Check-In interface had such a checkbox, and if you were to check-in from Item Status or Items Out with that org unit setting active, you'd have no option to print any slips associated with the check-in.  This fixes all that

git-svn-id: svn://svn.open-ils.org/ILS/trunk@17229 dcc99617-32d9-48b4-a31d-7c20da2025e4