See the title.

You're able to sort your "Free Games" and "Wishlist" lists by moving entries left and/or right but for whatever reason this sort option is not available for the "Things you own" and "Things you've rated" lists where it would also make a lot of sense.

Why is there no option for this? Or is there one and I just don't know where to find it?

How can I sort my purchased games and the list of games I've rated?