Hide legacy stats on trade website

I understand that game is ever evolving, and you're trying to keep player's progression by "patching" old items.
However, due to this kind of care, on trade website we can see a bunch of stats in list that can never appear in current league. They are either from legacy unique items or legacy mods on Rare items.

This is not only bad for search experience but also for servers performance, because we're forced to make two searches to know which stat is still working.

To keep both std and league players happy, I'm asking to show these legacy stats only if "League" filter is Standard/Hardcore.