[UI] Sales order fixes (#10024)

* Fix stock item reference

* Allow edit from allocated items sub-table

src/frontend/src/tables/sales/SalesOrderLineItemTable.tsx

@@ -480,8 +480,9 @@ export default function SalesOrderLineItemTable({
             orderId={orderId}
             lineItemId={record.pk}
             partId={record.part}
-            allowEdit={false}
+            allowEdit={true}
             modelTarget={ModelType.stockitem}
+            modelField={'item'}
             isSubTable
           />
         );