When renaming an uploaded item by choosing "Rename item", the resulting text box is blank. If I just want to change the capitalisation or remove the file extension (so it looks nice in my library), I need to type out the whole name again. It would be much nicer if the empty text box instead contained the existing item name as the default text. Then I could edit it easily. Or if I wanted to replace the name entirely, it's simple to select all of the text and overwrite it.