Support node: prefix in web_ui (#881)

The Node.js documentation's examples all use this prefix, and there are
now builtin modules in Node.js only accessible via it.  Add support for
using it in lib code shared in the web_ui.

packages/web_ui/webpack.common.js

@@ -38,6 +38,10 @@ module.exports = (env = {}, argv = {}) => ({
 				resource.request = resource.request.replace("@ant-design\/icons", "$&/es/icons");
 			}
 		),
+		// Strip node: prefix in request paths.
+		new webpack.NormalModuleReplacementPlugin(/^node:/, resource => {
+			resource.request = resource.request.replace(/^node:/, "");
+		}),
 	],
 	module: {
 		rules: [