Add viewport to popup

Author: xPaw

options/popup.html

@@ -4,6 +4,7 @@
 	<meta charset="UTF-8">
 	<title>SteamDB</title>
 	<meta name="color-scheme" content="light dark">
+	<meta name="viewport" content="width=device-width, initial-scale=1.0">
 	<link rel="stylesheet" href="popup.css">
 	<script src="popup.js" defer></script>
 </head>