Allow user customizable css

web/index.html

@@ -6,6 +6,7 @@
 		<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
 		<link rel="stylesheet" type="text/css" href="./lib/litegraph.css" />
 		<link rel="stylesheet" type="text/css" href="./style.css" />
+		<link rel="stylesheet" type="text/css" href="./user.css" />
 		<script type="text/javascript" src="./lib/litegraph.core.js"></script>
 		<script type="text/javascript" src="./lib/litegraph.extensions.js" defer></script>
 		<script type="module">

web/user.css

@@ -0,0 +1 @@
+/* Put custom styles here */