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.
Fixes #52638. See #51812.

git-svn-id: https://develop.svn.wordpress.org/trunk@50429 602fd350-edb4-49c9-b593-d223f7449a82

src/js/_enqueues/admin/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();
 	});
 
 	/**