Icon overlay for readonly files and folders in the web app

It would be nice to see whether the file or folder is readonly in web browser - if the external storage, incoming share or for any other reason I cannot modify the file or folder. At present, if we navigate to read-only folder it shows on the top that “You don’t have permission to upload or create files here” but it’s difficult to see if the file or folder entry is read-only until you try to do something with it.