fix(extension): harden controls, rules, and speed persistence

extension/popup/popup.html

@@ -4,6 +4,7 @@
     <meta charset="utf-8" />
     <title>Speeder</title>
     <link rel="stylesheet" href="popup.css" />
+    <script src="../shared/settings-core.js"></script>
     <script src="../shared/site-rules.js"></script>
     <script src="../shared/popup-controls.js"></script>
     <script src="../shared/ui-icons.js"></script>