Fix/minor mw fixes (#3521)

**What**
- Fix stock locations quantities being shown as `undefined` and `NaN`
- Throw if updates to location levels are made with negative quantities through the api
- Show "allocated" in order summary for partially fulfilled orders

Fixes CORE-1268, CORE-1267, CORE-1265

packages/admin-ui/ui/src/components/templates/inventory-table/index.tsx

@@ -456,6 +456,8 @@ const AdjustAvailabilityModal = ({
                 onChange={(e) => setStockedQuantity(e.target.valueAsNumber)}
                 autoFocus
                 type="number"
+                placeholder="0"
+                min={0}
                 value={stockedQuantity}
               />
             </div>