Fix problem with global variable in webpacked files

Author: dpvc

components/root-pack.js

@@ -2,5 +2,7 @@
 //  Replacement for __dirname for root directory
 //
 
-const config = global.MathJax?.config || {};
+import {MathJax} from '#js/components/global.js';
+
+const config = MathJax.config || {};
 export const mjxRoot = () => config?.loader?.paths?.mathjax || config?.__dirname || '/';