**What**
- handle single inventory items with `required_quantity > 1` correctly in the allocate UI flow
- display correct availability amount in the create fulullment form for inventory kit items
- fix check in the create fulfillment flow that would allow negative reservation because `required_quantity` wasn't included in the check
- show the most recent reservations first in the reservations table
- display an error in the allocation form if a reservation is not created for some inventory items
- display inventory kit in the order summary if the product has multiple same inventory items
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CLOSES SUP-1655
2f594291ad