Ticket #31884: 31884.diff

src/wp-admin/css/customize-widgets.css

@@ -23 +23 @@
         opacity: 0.5;
 }
 
-.customize-control-widget_form .widget-control-save,
-.customize-control-widget_form .spinner {
+.customize-control-widget_form .widget-control-save {
         display: none;
 }
+.customize-control-widget_form .spinner {
+        visibility: hidden;
+        margin-top: 0;
+}
 
 .customize-control-widget_form.previewer-loading .spinner {
-        display: inline;
+        visibility: visible;
 }
 
 .customize-control-widget_form.widget-form-disabled .widget-content {