- Enhancement: For anyone visiting the ES6 modules entrance file without ESM

support, redirect to non-modular vesion
- Build: Add comment not to edit xdomain editor directly

editor/extensions/imagelib/openclipart-es.html

@@ -4,6 +4,7 @@
     <meta charset="utf-8">
     <title>-</title>
     <link rel="icon" type="image/png" href="../../images/logo.png"/>
+    <script nomodule="" src="no-module-support-redirect.js"></script>
     <script src="../../external/dom-polyfill/dom-polyfill.js"></script>
     <script src="../../external/@babel/polyfill/polyfill.min.js"></script>
     <script type="module" src="openclipart.js"></script>