Add option to sort by Last Seen online to Friend's list

I've been playing this game a looooooong time and I have maxed out my friend's list.

It's hard to make room based on guessing who I haven't seen in a while.

Can we please add the option to sort by "Last Seen Online" on the friend's list? We do not need to know the specific date time. I just want the ability to have the most recent people who have logged in at the top, and the people who haven't logged in for 8 years at the bottom, so I know to start pruning from there.

This would be in addition to all the current Sort options, of course.