Customizer: Add label for menu names when editing a menu.

Props celloexpressions.
Fixes #32726.



git-svn-id: https://develop.svn.wordpress.org/trunk@33346 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/class-wp-customize-control.php

@@ -1880,6 +1880,9 @@ class WP_Customize_Nav_Menu_Name_Control extends WP_Customize_Control {
 	protected function content_template() {
 		?>
 		<label>
+			<# if ( data.label ) { #>
+				<span class="customize-control-title screen-reader-text">{{ data.label }}</span>
+			<# } #>
 			<input type="text" class="menu-name-field live-update-section-title" />
 		</label>
 		<?php