Sorting friends list by categories.

Well, I was going to unfollow a friend's plurks. I opened my friends list, and I had to go through 5 pages before reaching his page. His name starts with A, his display name starts with M, and his username starts with A. How are my friends sorted exactly? I found him beside someone with username and display name that starts with I, first name F. (I don't remember the other one.)

So, I'm suggesting a sort by function. Sort by real name, username or display name. Or by clique. Whatever way we can sort the list. :)