Customize: Ensure the New Menu section is properly rendered.

Follow-up to [30102], [49101].

Props david.binda, boldgrid, dlh, azaozz, Clorith, westonruter, hellofromTonya.
Fixes #51592.
Built from https://develop.svn.wordpress.org/trunk@49323


git-svn-id: http://core.svn.wordpress.org/trunk@49084 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/js/customize-controls.js

@@ -3700,8 +3700,8 @@
 						parentContainer = ( section.contentContainer.is( 'ul' ) ) ? section.contentContainer : section.contentContainer.find( 'ul:first' );
 						if ( ! control.container.parent().is( parentContainer ) ) {
 							parentContainer.append( control.container );
-							control.renderContent();
 						}
+						control.renderContent();
 						control.deferred.embedded.resolve();
 					});
 				});

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.6-beta1-49322';
+$wp_version = '5.6-beta1-49323';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.