Disable webpack optimization for themes

Sorry. If you want to, you can handle that with your reverse proxy. But I don't believe it will cause much problems, as theme .csses should be already cached by the browser.

webpack.config.js

@@ -157,6 +157,7 @@ export default {
         minify: true,
         css: true,
         legalComments: 'none',
+        exclude: [new RegExp(`css\\/(${Object.keys(themes).join('|')})\\.css$`)],
       }),
     ],
     splitChunks: {