Pseudo-random sort order for package list added

Pseudo-random sort order for package list added

Pseudo-random sort ordering will order the list differently for
each session (not each page refresh) by using a random seed and a
cookie. The database now contains the package_list_order field,
and management for package list has a dropdown for this setting.

The default is still Alpha-Numeric, and the config values used are
the ones in the Member DB plugin.ini file.