I would like to add that if you have an entry in your sidebar menu for deleting files and you right click on a file also opens it in a preview tab. Then when you delete the file and confirm that you want it deleted the preview tab does not close. You then have to close it and go through the "close without saving" dialog. Deleting a file is very difficult with the preview function turned on. Maybe that will be better for some people because it help prevent accidental deletes but I find it to be slightly annoying. So, I had to turn file previews off even-though I really like the preview function.
I don't always delete files but when I do I delete them all.
ST3:3059 on Linux