Update add job js

app/static/js/add_job.js

@@ -19,6 +19,7 @@ function SubmitAddJobForm(newJobFormElement, progressModalElement, request) {
     }
     if (request.status === 400) {
       console.log(JSON.parse(this.responseText));
+      // TODO print errors under input fields.
     }
     if (request.status === 500) {
       location.reload();