[Feature] Auto populate complementary sets

[FI00ds]

Motivation

When applying set filters, it can be hard to keep track of which 2+2 pairings I have and haven't applied

Goal

When selecting a 2+2 pairing, automatically select the complemetary set pairing e.g. If I choose 2+2 musketeer > prisoner, then automatically select 2+2 prisoner > musketeer

[fribbels]

Overall the sets selector is probably due for a UI overhaul, its getting way too big