JavaScript error when showing a FormException after Apply is clicked.…

… Related to JENKINS-20772 but probably not the same.

(cherry picked from commit 9f23c0b)

core/src/main/java/hudson/model/Descriptor.java

@@ -967,7 +967,7 @@ public String getFormField() {
 
         public void generateResponse(StaplerRequest req, StaplerResponse rsp, Object node) throws IOException, ServletException {
             if (FormApply.isApply(req)) {
-                FormApply.applyResponse("notificationBar.show(" + quote(getMessage())+ ",notificationBar.defaultOptions.ERROR)")
+                FormApply.applyResponse("notificationBar.show(" + quote(getMessage())+ ",notificationBar.ERROR)")
                         .generateResponse(req, rsp, node);
             } else {
                 // for now, we can't really use the field name that caused the problem.