IO-2175 Category Dropdown Clear

Allow for clear and correct for Select allowClear sending undefined and convert that to null. Overload UndefinedtoNull to have an array of keys

client/src/pages/jobs-detail/jobs-detail.page.component.jsx

@@ -51,6 +51,7 @@ import JobAuditTrail from "../../components/job-audit-trail/job-audit-trail.comp
 import AuditTrailMapping from "../../utils/AuditTrailMappings";
 import { insertAuditTrail } from "../../redux/application/application.actions";
 import JobsDocumentsLocalGallery from "../../components/jobs-documents-local-gallery/jobs-documents-local-gallery.container";
+import UndefinedToNull from "../../utils/undefinedtonull";
 
 const mapStateToProps = createStructuredSelector({
   bodyshop: selectBodyshop,
@@ -96,7 +97,7 @@ export function JobsDetailPage({
       variables: {
         jobId: job.id,
         job: {
-          ...values,
+          ...UndefinedToNull(values, ["alt_transport", "category", "referral_source"]),
           parts_tax_rates: {
             ...job.parts_tax_rates,
             ...values.parts_tax_rates,