I use the Comments feature in the Editor a lot whilst translating. If I select a comment in the Comments pane and then click the Delete button, the comment is deleted straight away without prompting me whether I really want to delete that comment. Maybe this is a good thing as I don't need to confirm again but I am waiting for the day when I delete a long comment by accident. My suggestion would be to add an Undo button for comments in the Comments pane.