[PUI] Active user filter (#7833)

* Fix status label renderer colors

* Add "active" filters to forms

* Fix "is_active" filter

* Limit filters to active users / owners

src/frontend/src/forms/PurchaseOrderForms.tsx

@@ -178,6 +178,9 @@ export function usePurchaseOrderFields(): ApiFormFieldSet {
         }
       },
       responsible: {
+        filters: {
+          is_active: true
+        },
         icon: <IconUsers />
       }
     };