Suggestion: Change Folder Icon on Toolbar for Menus that are Torn Off

I have toolbars, each with many menus in them. Some menus are torn off, but others are not. There is no way to determine whether a menu has been torn off by looking at the toolbar.

I suggest that the folder icon should automatically change for each torn off menu. Perhaps it should change to the image of a folder with a T on it.

Thanks for considering this.