Add polyfills of sandbox back in

Author: CompuIves

packages/app/config/webpack.common.js

@@ -65,7 +65,10 @@ module.exports = {
           require.resolve('./polyfills'),
           path.join(paths.appSrc, 'index.js'),
         ],
-        sandbox: [path.join(paths.sandboxSrc, 'index.js')],
+        sandbox: [
+          require.resolve('./polyfills'),
+          path.join(paths.sandboxSrc, 'index.js'),
+        ],
         'sandbox-startup': path.join(paths.sandboxSrc, 'startup.js'),
         embed: [
           require.resolve('./polyfills'),