Issue #1662986 follow-up by swentel: Fixes to Field UI CSS.

core/modules/field_ui/field_ui.admin.css

@@ -66,6 +66,3 @@
 .field-ui-overview .field-formatter-settings-edit-form .formatter-name{
   font-weight: bold;
 }
-.field-ui-overview .refresh-button {
-  display: none;
-}

core/modules/field_ui/lib/Drupal/field_ui/DisplayOverview.php

@@ -382,6 +382,7 @@ class DisplayOverview extends OverviewBase {
         // spinners will be added manually by the client-side script.
         'progress' => 'none',
       ),
+      '#attributes' => array('class' => array('element-invisible'))
     );
 
     $form['actions'] = array('#type' => 'actions');