Bug 11552: allow searching on original order number after a transfer

If an order is transferred from one basket to another, it should be
possible to retrieve it with the original order number (AKA order
line).  This patch makes it so.

Test plan:
- transfer an order
- note the original order number and the new one
- receive the order and, on the parcel page, try to find your order with
  the original order number and the new one.

Signed-off-by: sonia bouis <sonia.bouis@univ-lyon3.fr>
Signed-off-by: Brendan Gallagher <brendan@bywatersolutions.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>

RM note: this works only for the most recent transfer, so if an order
gets transferred multiple times, earlier order numbers won't retrieve
it.
Bug 11552: (follow-up) fix a typo in a comment

Signed-off-by: Galen Charlton <gmc@esilibrary.com>