Made sure all web dependencies load over HTTPS

static/head.html

@@ -3,7 +3,7 @@
 <script src="https://code.jquery.com/jquery.js"></script>
 <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/canvasjs/1.7.0/canvasjs.js"></script>
-<script src="http://momentjs.com/downloads/moment.min.js"></script>
+<script src="https://momentjs.com/downloads/moment.min.js"></script>
 <script src="https://craig.global.ssl.fastly.net/js/mousetrap/mousetrap.min.js"></script>
 <script src="main.js"></script>
 <link href="https://fonts.googleapis.com/css?family=Roboto" rel="stylesheet">