Portrait management reform and correction
Moved logics to create a portrait in a proc in order to reuse it in other places
such as picture retrieval services (e.g. Bach picture retrieval at WU). Turns out
we were not doing our homeworks here: when the portrait is created into CR, a
cr_child_rel is created. When the portrait was erased though, this was not cleaned
up propely, leaving dangling acs_objects with no reference in cr_child_rels table.
On busy sites, this can grow in the ten thousands order of magnitude. Changes include
also fix for this behavior and tuples cleanup.
