Include call number prefix/suffix in display and sorting of holds for Print Full...

Include call number prefix/suffix in display and sorting of holds for Print Full Pull List (Alternate strategy).  Also fix things so that we're sorting on the label_sortkey for call number, and not the label.  So, for this interface, the hard-wired sort order is Copy Location Order (as defined by Admin -> Local Administration -> Copy Location Order), Call Number Prefix, Call Number Label, Call Number Suffix, and Hold Request time.

Signed-off-by: Jason Etheridge <jason@esilibrary.com>