ISAICP-4392: Improve the user cancelation form structure.

web/profiles/joinup/src/Form/UserCancelForm.php

@@ -66,6 +66,11 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     // Prepare a list of collections where the user is the sole owner.
     $collections = $this->relationManager->getCollectionsWhereSoleOwner($this->entity);
     if (!empty($collections)) {
+      // No access to the 'Cancel' button should be given if the user is the
+      // sole owner of a collection.
+      $form['actions']['submit']['#access'] = FALSE;
+      $cancel_action = ConfirmFormHelper::buildCancelLink($this, $this->getRequest());
+      $cancel_action['#title'] = $this->t('Go back');
       $form += [
         'collections' => [
           '#theme' => 'item_list',
@@ -77,7 +82,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
         'actions' => [
           '#type' => 'actions',
           // @see \Drupal\Core\Entity\ContentEntityConfirmFormBase::actions()
-          'cancel' => ConfirmFormHelper::buildCancelLink($this, $this->getRequest()),
+          'cancel' => $cancel_action,
           '#weight' => 10,
         ],
       ];
@@ -108,8 +113,6 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       // delete the user at this point.
       unset($form['description']);
     }
-
-    $form['actions']['cancel']['#title'] = $this->t('Go back');
     $form['user_cancel_method']['#default_value'] = 'user_cancel_delete';
     $form['user_cancel_method']['#access'] = FALSE;
     $form['user_cancel_confirm']['#access'] = FALSE;