Bug 16259: Replace CGI->param with CGI->multi_param in list context - part 2

Bug 16259: Replace CGI->param with CGI->multi_param in list context - part 2

This patch is a follow-up of bug 16154.

It removes the warning "CGI::param called in list context" in the
following scripts:
admin/branches.pl
admin/categories.pl
admin/patron-attr-types.pl
admin/preferences.pl
catalogue/image.pl
circ/circulation.pl
patroncards/add_user_search.pl
serials/add_user_search.pl
tools/marc_modification_templates.pl
virtualshelves/shelves.pl

Note that the warning from catalogue/itemsearch.pl still exists (the
call to CGI->param is done from the template).

Test plan:
- Add/modify a library, patron category, patron attr type
- Update a syspref
- Set localcoverimage and call catalogue/image.pl?biblionumber=XXX
- Search for patrons in the patron cards or serials module
- Add a marc modification templates
- Add a list (shelves)

You should not get the warning in the log after all these actions.

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>