Toolbar Modifications

basic.php

add_action( 'admin_bar_menu', 'my_new_toolbar_item', 999 );

function my_new_toolbar_item( $wp_admin_bar ) {
	$args = array(
		'id'    => 'my_new_item',
		'title' => 'Media Settings',
		'href'  => admin_url() . 'options-media.php',
	);
	$wp_admin_bar->add_node( $args );
}

quick-menu-improved.php

dd_action( 'admin_bar_menu', 'toolbar_quick_menu', 999 );

function toolbar_quick_menu( $wp_admin_bar ) {

	$menu = array(
		array(
			'id'    => 'quick_menu',
			'title' => 'Quick Menu',
			'href'  => admin_url() . 'options-general.php',
		),
		array(
			'id'    => 'media_settings',
			'title' => 'Media Settings',
			'href'  => admin_url() . 'options-media.php',
			'parent' => 'quick_menu'
		),
		array(
			'id'    => 'add_user',
			'title' => 'Add User',
			'href'  => admin_url() . 'user-new.php',
			'parent' => 'quick_menu'
		),
		array(
			'id'    => 'edit_categories',
			'title' => 'Edit Categories',
			'href'  => admin_url() . 'useedit-tags.php?taxonomy=category',
			'parent' => 'quick_menu'
		)
	);

	foreach( $menu as $args ) {
		$wp_admin_bar->add_node( $args );
	}
	
}

quick-menu.php

add_action( 'admin_bar_menu', 'toolbar_quick_menu', 999 );

function toolbar_quick_menu( $wp_admin_bar ) {
	$args = array(
		'id'    => 'quick_menu',
		'title' => 'Quick Menu',
		'href'  => admin_url() . 'options-general.php',
	);
	$wp_admin_bar->add_node( $args );

	$args = array(
		'id'    => 'media_settings',
		'title' => 'Media Settings',
		'href'  => admin_url() . 'options-media.php',
		'parent' => 'quick_menu'
	);
	$wp_admin_bar->add_node( $args );

	$args = array(
		'id'    => 'add_user',
		'title' => 'Add User',
		'href'  => admin_url() . 'user-new.php',
		'parent' => 'quick_menu'
	);
	$wp_admin_bar->add_node( $args );

	$args = array(
		'id'    => 'edit_categories',
		'title' => 'Edit Categories',
		'href'  => admin_url() . 'useedit-tags.php?taxonomy=category',
		'parent' => 'quick_menu'
	);
	$wp_admin_bar->add_node( $args );

}