If there is two move lines for the same product in the vertical lift
(stored in2 differents trays for instance), the pick scenario was
failing when the user was processing the first line.
To circumvent this, instead of validating directly the move, we put the line
in its own stock move, then we put the stock move in its own transfer and
validate this one.
Methods used to do that have been copied from the `shopfloor` module,
they probably deserves their own module as they are quite generic.
When the shuttle screen propose a tray based on a tray type and we
are in the 'save' step, where we are supposed to physically putaway
the good and save, we should still be able to change the tray type
to fetch another tray.
Compatibility module between stock_vertical_lift and stock_storage_type
(in OCA/wms).
In the vertical lift's Putaway screen, when a good is scanned for a putaway, the
user has to scan the tray type of the corresponding size, so an empty place in a
matching tray is found. When we use storage types, we should know what tray is
compatible with the storage type.
Changes with this module:
* The storage types of trays cannot be selected in the locations form, they have
to be set in the Tray types.
* In the lift put-away screen, when a package has a storage type, the user isn't
asked to scan a tray type, instead, the putaway of the Package Storage Type is
applied.
