Switch from jquery slim to full.

web/templates/header.html

@@ -6,7 +6,7 @@
   <title>Hestia - <?=__($TAB)?></title>
   <link rel="stylesheet" href="/css/styles.min.css?1446554103">
   <link type="text/css" href="/css/jquery-custom-dialogs.css?1446554103" rel="stylesheet" />
-  <script src="/inc/jquery/jquery-3.3.1.slim.min.js"></script>
+  <script src="/inc/jquery/jquery-3.3.1.min.js"></script>
   <script>
     //
     //  GLOBAL SETTINGS