Only show options that are possible given the selected filters

[atomicptr]

This selection should probably only show "Aetheric Evasion" and "Evasive Fury" in perks instead of everything. This is a bit more complicated than just filtering things however due to having multi selects. Because the moment you pick lets say "Berserker" in perks it will obviously only show Berserker. To solve this you probably have to determine what the list looks like before applying the current (Perks) filter and only show perks that are available from that selection.