bug 2000 - alternate issuing rules - set sorting of rules

bug 2000 - alternate issuing rules - set sorting of rules

Issuing rules are now explicitly sorted by patron category,
then item type.  The default patron category sorts last; within
a list of item types for a given patron category, the default
item type sorts last.  This follows the order in which
the issuing rules are applied.

Since the primary sort is patron category, also moved that
to be the first column in the issuing rules table.

Signed-off-by: Joshua Ferraro <jmf@liblime.com>