It's Not the most elegant solution, but you could just change the labels like
Date created (recent first)
Date modified (recent first)
and change the ascending box to reverse order or something. If the labels could change if the box is ticked and unticked all the better.
Date created (recent first)
Date modified (recent first)
and change the ascending box to reverse order or something. If the labels could change if the box is ticked and unticked all the better.