Frontend:
- When product has lot/serial tracking open popup for accept lot/serial
number when it selected.
- Add icon in order line to show related lot/serial number and it
indicate status of product lot
- User can add or remove product by lot from current lot dialog box
- Order line quantity don't match with lot line quantity show warning
message
Back End:
- Added model `pos.pack.operation.lot` to manage product lot related
with pos order
- Added state button in pos session form view to show pickings which are
not in 'Done' stage