Administration: Revert the change to `click` event handler for fly-out submenus.

The `click()` method there is not the jQuery method, but is an HTML DOM method instead.

This makes the fly-out submenu header clickable again when the menu is folded.

Follow-up to [50420].

Props peterwilsoncc, SergeyBiryukov.
Merges [50429] to the 5.7 branch.
Fixes #52638. See #51812.

Built from https://develop.svn.wordpress.org/branches/5.7@50437


git-svn-id: http://core.svn.wordpress.org/branches/5.7@50048 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/js/common.js

@@ -840,7 +840,7 @@ $document.ready( function() {
 	 * @return {void}
 	 */
 	$adminmenu.on('click.wp-submenu-head', '.wp-submenu-head', function(e){
-		$(e.target).parent().siblings('a').get(0).trigger( 'click' );
+		$(e.target).parent().siblings('a').get(0).click();
 	});
 
 	/**

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.7-RC1-50431';
+$wp_version = '5.7-RC1-50437';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.