Previously, if an order had two fulfilments that fully satisfied the order, then only one was shipped, the status would change to `partially_shipped` and show the "Create Fulfillment" button again, which would open a buggy modal with no items to fulfil. Added another check that looks at the items in the order and compares `quantity` and `fulfilled_quantity`, so that we can hide the button based on this as well, rather than just the order's `fulfillment_status`, which can be misleading.
Also added a status icon to the Fulfillment card's title bar for the `partially_shipped` status, as this area was blank before in that state.
Resolves CORE-1262
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