Issue #3143678by ckng: Allow node/entity to display title/label field as normal

Closes #3143678

manage_display.module

@@ -6,6 +6,8 @@
  */
 
 use Drupal\Core\Entity\EntityTypeInterface;
+use Drupal\node\Entity\Node;
+use Drupal\Core\Entity\Display\EntityViewDisplayInterface;
 use Drupal\Core\Form\FormStateInterface;
 
 /**
@@ -139,20 +141,11 @@ function manage_display_form_system_theme_settings_alter(&$form, FormStateInterf
 }
 
 /**
- * Implements template_preprocess_node().
+ * Implements hook_ENTITY_TYPE_view() for node entities.
  */
-function manage_display_preprocess_node(&$variables) {
-  $node = $variables['elements']['#node'];
-
-  // Add title markup to content array.
-  $display_view_mode = 'node.' . $node->getType() . '.' . $variables['view_mode'];
-  $display = \Drupal::entityTypeManager()->getStorage('entity_view_display')->load($display_view_mode);
-
-  if ($display) {
-    $title_field = $display->getComponent('title');
-    $variables['content']['title'] = [
-      '#markup' => $variables['elements']['#title'],
-      '#weight' => $title_field['weight'],
-    ];
-  }
+function manage_display_node_view(array &$build, Node $entity, EntityViewDisplayInterface $display, $view_mode) {
+  $build['title_field'] = $build['title'];
+  $title_field = $display->getComponent('title');
+  $build['title_field']['#weight'] = $title_field['weight'];
+  unset($build['title']);
 }