As procurement_jit has been optimized (by running multiple procurements at once),
it does not make sense to still have a module that without it, does not generate Pick > Pack > Ship
automatically, but only Ship. We can do it anyways.
That way, the procurement_jit module can become clearer in its functionality to the user: when
a sale order is confirmed, it will automatically reserve the picking from the stock location (in case of MTS)
and people who don't want that functionality can still immediately have the Pick > Pack > Ship.
Make sure also push_apply works with manually created pickings.
Josse Colpaert
0f89721cda