Update context-menu.js

Author: benhatsor

context-menu.js

@@ -53,7 +53,7 @@ contextMenu = {
 
         contextMenu.el.classList.add('visible', 'animating');
 
-        contextMenu.classList.toggle('modified', file.classList.contains('modified'));
+        contextMenu.el.classList.toggle('modified', file.classList.contains('modified'));
 
         window.setTimeout(() => {