Created attachment 174850 [details] Mockup of how it would be nice If you have same filenames & same previews it is hard to find which file is what type. In my screenshot there are .odt and .pdf with same content and they look as 100% same files. I propose to add a tiny file type icon in the preview corner.
Thanks for the mock-up. I can see the value of this. It would make it much easier to visually differentiate between document types.