Order table variants (#8295)

* BuildOrderTable: Show variants

- Allow filtering of build orders by part variant

* Add "include_variants" filter for SalesOrder table

- A bit tricker!

* Add "include_variants" filter to PartPurchaseOrdersTable

* Enable filtering ReturnOrder by "part" attribute

* Add similiar functionality for SalesOrderAllocation

* Add similar filter for BuildAllocation table

* Add migration file

src/frontend/src/tables/build/BuildAllocatedStockTable.tsx

@@ -45,17 +45,30 @@ export default function BuildAllocatedStockTable({
   modelField?: string;
 }>) {
   const user = useUserState();
-  const table = useTable('buildallocatedstock');
+  const table = useTable(
+    !!partId ? 'buildallocatedstock-part' : 'buildallocatedstock'
+  );
 
   const tableFilters: TableFilter[] = useMemo(() => {
-    return [
+    let filters: TableFilter[] = [
       {
         name: 'tracked',
         label: t`Allocated to Output`,
         description: t`Show items allocated to a build output`
       }
     ];
-  }, []);
+
+    if (!!partId) {
+      filters.push({
+        name: 'include_variants',
+        type: 'boolean',
+        label: t`Include Variants`,
+        description: t`Include orders for part variants`
+      });
+    }
+
+    return filters;
+  }, [partId]);
 
   const tableColumns: TableColumn[] = useMemo(() => {
     return [