@trepmal's My Sites Search plugin for wordpress multisite menus with too many sites

my-sites-search.php

<?php
/*
 * Plugin Name: My Sites Search
 * Plugin URI: trepmal.com
 * Description: https://twitter.com/trepmal/status/443189183478132736
 * Version:
 * Author: Kailey Lampert
 * Author URI: kaileylampert.com
 * License: GPLv2 or later
 * License URI: http://www.gnu.org/licenses/gpl-2.0.html
 * TextDomain: mss
 * DomainPath:
 * Network:
 */


add_action( 'admin_bar_menu', 'mss_admin_bar_menu' );
function mss_admin_bar_menu( $wp_admin_bar ) {
        $wp_admin_bar->add_menu( array(
                'parent' => 'my-sites-list',
                'id'     => 'my-sites-search',
                'title'  => '<input type="text" placeholder="Search sites" />',
        ) );
}

add_action( 'admin_footer', 'mss_admin_footer' );
add_action( 'wp_footer', 'mss_admin_footer' );
function mss_admin_footer() {
        // This should suck less, but alas...
        ?>
        <style>
        #wp-admin-bar-my-sites-search {
                height: 34px;
        }
        </style>
        <script>
        jQuery(document).ready( function($) {
                $('#wp-admin-bar-my-sites-search input').keyup( function( ) {

                        var searchValRegex = new RegExp( $(this).val(), 'i');

                        $('#wp-admin-bar-my-sites-list > li.menupop').hide().filter(function() {

                                return searchValRegex.test( $(this).find('> a').text() );

                        }).show();

                });
        });
        </script>
        <?php
}