controller_admin_category_sorter
Shows the admin category screen where you can edit the category tree, rearranging the categories, adding new categories, or removing existing ones.
The controller is available through the admin_category_sorter dispatch rule
and requires permission to use mod_admin_category. It renders
admin_category_sorter.tpl with page_admin_category_sorter set, allowing the
admin navigation to mark the category screen as active.
Tree mutations are handled by the category admin actions and postbacks used by that template; this controller only authorizes and renders the screen.