[Web] Add jqplot for future graphs

data/web/inc/footer.inc.php

@@ -9,6 +9,8 @@ require_once $_SERVER['DOCUMENT_ROOT'] . '/modals/footer.php';
 <script src="/js/bootstrap-filestyle.min.js"></script>
 <script src="/js/notifications.min.js"></script>
 <script src="/js/formcache.min.js"></script>
+<script src="/js/jquery.jqplot.min.js"></script>
+<script src="/js/jqplot.donutRenderer.js"></script>
 <script src="/js/numberedtextarea.min.js"></script>
 <script src="/js/u2f-api.js"></script>
 <script src="/js/api.js"></script>

data/web/inc/header.inc.php

@@ -26,6 +26,7 @@
 <link rel="stylesheet" href="/css/mailcow.css">
 <link rel="stylesheet" href="/css/animate.min.css">
 <link rel="stylesheet" href="/css/numberedtextarea.min.css">
+<link rel="stylesheet" href="/css/jquery.jqplot.min.css">
 <?= (preg_match("/mailbox.php/i", $_SERVER['REQUEST_URI'])) ? '<link rel="stylesheet" href="/css/mailbox.css">' : null; ?>
 <?= (preg_match("/admin.php/i", $_SERVER['REQUEST_URI'])) ? '<link rel="stylesheet" href="/css/admin.css">' : null; ?>
 <?= (preg_match("/user.php/i", $_SERVER['REQUEST_URI'])) ? '<link rel="stylesheet" href="/css/user.css">' : null; ?>