webui: Remove some more external requests

Again this is good for compliance with the GDPR and probably a better
first impression for users who care and/or use plugins that block these.

Author: MKleusberg

webui/templates/head.html

@@ -4,8 +4,8 @@
     <title>DBHub.io - [[ .Meta.Title ]]</title>
     <script src="/js/angular-1.8.2.min.js"></script>
     <script src="/js/angular-sanitize-1.8.2.min.js"></script>
-    <script src="//angular-ui.github.io/bootstrap/ui-bootstrap-tpls-2.5.0.min.js"></script>
-    <link href="//netdna.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
+    <script src="/js/ui-bootstrap-tpls-2.5.0.min.js"></script>
+    <link href="/css/bootstrap-3.3.7.min.css" rel="stylesheet">
     <link rel="stylesheet" href="/css/font-awesome-4.7.0.min.css" integrity="sha384-dNpIIXE8U05kAbPhy3G1cz+yZmTzA6CY8Vg/u2L9xRnHjJiAK76m2BIEaSEV+/aU" crossorigin="anonymous">
     <link href="/css/local.css" rel="stylesheet">
     <script src="//cdn.auth0.com/js/lock/11.35.0/lock.min.js"></script>