If the picking has no carrier set, do not open the put in pack wizard
and keep the behavior of a classic picking. Also, filter the delivery
packages according to the carrier (note: this doesn't work at the moment
because of a bug in the new views, but it'll be fixed very soon, so we
merge anyway).
Also, remove an harmless typo in `manage_package_type` method.
Pierre Masereel
2c84ecc92f