Add fields back to form after clearing associated rules

stripe.php

@@ -123,12 +123,16 @@ function stripe_civicrm_upgrade($op, CRM_Queue_Queue $queue = NULL) {
  * @param $errors - Reference to the errors array.
  */
 function stripe_civicrm_validateForm($formName, &$fields, &$files, &$form, &$errors) {
-  if (isset($form->_paymentProcessor['payment_processor_type']) &&$form->_paymentProcessor['payment_processor_type'] == 'Stripe') { 
+  if (isset($form->_paymentProcessor['payment_processor_type']) && $form->_paymentProcessor['payment_processor_type'] == 'Stripe') {
     if($form->elementExists('credit_card_number')){
-      $form->removeElement('credit_card_number');
+      $cc_field = $form->getElement('credit_card_number');
+      $form->removeElement('credit_card_number', true);
+      $form->addElement($cc_field);
     }
     if($form->elementExists('cvv2')){
-      $form->removeElement('cvv2');
+      $cvv2_field = $form->getElement('cvv2');
+      $form->removeElement('cvv2', true);
+      $form->addElement($cvv2_field);
     }
   }
 }