I've created a custom taxonomy ("Curatorial Categories") and associated a couple of custom fields with it (including a field into which someone can enter a number, which we'll call "Order"). Please refer to the attached screenshot.
In the WP dashboard, when looking at the list of taxonomy terms, I'd like to be able to click on "Order" in the column header to sort the terms by the Order field, in the same way that I can click on the "Name" and "Slug" column names.
I know I have to add some PHP code to do this. Can you point me to the correct WordPress hook? And might you have some starter code?