made includelet "categories" folder aware (on can pass "parent" in form of a page-ref to the includelet) refactored some of the code to increase reusability
Reinstate retrieval of the package_id from the connection context in child-resources, the problem was that, when we required a connection context in create_form_page_instance, we did with no information whatsoever, which was then retrieved by e.g. ns_conn, sometimes wrongly (e.g. when one is running under the test package)