Allow sort warning to be (temporary) disabled
I understand it's there to make sure users know what's happening, but there should be a way to disable the "Sort Warning" error that is shown when a user attempts to sort a single column.
Currently, when having to sort multiple single columns, a user must confirm their choice every time they do it. This is time consuming and pointless after the first couple of times it's shown. It wouldn't be so bad if it remembered your last choice, so a user could just hit enter to continue, but every time the choice has to be selected and then the popup can be closed.
I think the best solution to this would be to offer the user a third option that says, "Disable this warning for this session" or "Disable this warning for this workbook". It could even be limited to showing only after a second or third sort is attempted.