Issue #2044505 by bowersox: Fixed Remove empty headers in Views UI <h2 id="views-ajax-title"></h2>.

core/modules/views_ui/css/views_ui.admin.css

@@ -243,7 +243,6 @@
   overflow: hidden;
 }
 
-.views-ui-dialog #views-ajax-title,
 .views-ui-dialog #views-ajax-body {
   margin: 0;
   padding: 0;

core/modules/views_ui/css/views_ui.admin.theme.css

@@ -877,9 +877,10 @@ ul#views-display-menu-tabs li.add ul.action-list li{
   margin: 0;
 }
 
-.views-ui-dialog #views-ajax-title {
+.views-ui-dialog #views-ajax-title h2 {
   font-size: 15px;
   padding: 8px 13px;
+  margin: 0;
 }
 
 .views-ui-dialog #views-progress-indicator {

core/modules/views_ui/js/ajax.js

@@ -10,7 +10,7 @@
     var ajax_title = Drupal.settings.views.ajax.title;
     var ajax_body = Drupal.settings.views.ajax.id;
     var ajax_popup = Drupal.settings.views.ajax.popup;
-    $(ajax_title).html(response.title);
+    $(ajax_title).html('<h2>' + response.title + '</h2>');
     $(ajax_body).html(response.output);
     $(ajax_popup).dialog('open');
     Drupal.attachBehaviors($(ajax_popup), ajax.settings);

core/modules/views_ui/lib/Drupal/views_ui/ViewEditFormController.php

@@ -200,7 +200,7 @@ public function form(array $form, array &$form_state) {
         '#id' => 'views-ajax-popup',
       );
       $form['ajax-area']['ajax-title'] = array(
-        '#markup' => '<h2 id="views-ajax-title"></h2>',
+        '#markup' => '<div id="views-ajax-title"></div>',
       );
       $form['ajax-area']['ajax-body'] = array(
         '#type' => 'container',