diff -u b/core/themes/seven/seven.theme b/core/themes/seven/seven.theme
--- b/core/themes/seven/seven.theme
+++ b/core/themes/seven/seven.theme
@@ -126,6 +126,10 @@
   if (isset($type['button'])) {
     $type['button']['#attached']['library'][] = 'core/modernizr';
   }
+
+  if (isset($type['bulk_operations'])) {
+    $type['bulk_operations']['#pre_render'][] = 'seven_bulk_operations_pre_render';
+  }
 }
 
 /**
@@ -190,8 +194,8 @@
 /**
- * Implements hook_form_BASE_FORM_ID_alter() for \Drupal\BulkForm.
- *
- * Adds class form-wrapper--bulk-form to bulk_action_form_wrapper.
+ * #pre_render callback: Sets a variation class for bulk form form wrapper.
  */
-function seven_form_views_form_content_page_1_alter(&$form, FormStateInterface $form_state ) {
-  $form['header']['node_bulk_form']['#attributes']['class'][] = 'form-wrapper--bulk-form';
+function seven_bulk_operations_pre_render($element) {
+  $element['#attributes']['class'][] = 'form-wrapper--bulk-form';
+
+  return $element;
 }
only in patch2:
unchanged:
--- /dev/null
+++ b/core/lib/Drupal/Core/Render/Element/BulkOperations.php
@@ -0,0 +1,11 @@
+<?php
+
+namespace Drupal\Core\Render\Element;
+
+/**
+ * Provides a render element that provides wrapper for bulk operations.
+ *
+ * @RenderElement("bulk_operations")
+ */
+class BulkOperations extends Container {
+}
only in patch2:
unchanged:
--- a/core/modules/comment/src/Form/CommentAdminOverview.php
+++ b/core/modules/comment/src/Form/CommentAdminOverview.php
@@ -100,10 +100,7 @@ public function buildForm(array $form, FormStateInterface $form_state, $type = '
 
     // Build an 'Update options' form.
     $form['options'] = array(
-      '#type' => 'details',
-      '#title' => $this->t('Update options'),
-      '#open' => TRUE,
-      '#attributes' => array('class' => array('container-inline')),
+      '#type' => 'bulk_operations',
     );
 
     if ($type == 'approval') {
@@ -117,7 +114,6 @@ public function buildForm(array $form, FormStateInterface $form_state, $type = '
     $form['options']['operation'] = array(
       '#type' => 'select',
       '#title' => $this->t('Action'),
-      '#title_display' => 'invisible',
       '#options' => $options,
       '#default_value' => 'publish',
     );
only in patch2:
unchanged:
--- a/core/modules/system/src/Plugin/views/field/BulkForm.php
+++ b/core/modules/system/src/Plugin/views/field/BulkForm.php
@@ -275,7 +275,7 @@ public function viewsForm(&$form, FormStateInterface $form_state) {
 
       // Ensure a consistent container for filters/operations in the view header.
       $form['header'] = array(
-        '#type' => 'container',
+        '#type' => 'bulk_operations',
         '#weight' => -100,
       );