Make selected source visible during order fulfillment

[vrann]

Per Source Selection Algorithms HLD

Information about selected warehouse reflected on the Order and be available during the fulfillment.

Acceptance Criteria:

1. Merchant views and modifies sources selected for delivery after order is placed before shipment is created
2. Merchant views relevant source data for all shipments from the order shipments list and detail page for each shipment
3. Merchant defines which sources are used for fulfillment for each website