[1.5.10 Ashes] Big Demon Seed Icon not showing in inventory

[helminthauge]

by "big", I mean those demons with an image size larger than 64*64 (and I think that's every demon but fire imps, wretchling, water imp and quasit). I understand that 64*128 icon doesn't suit well in a square frame, so maybe make it show the upper part as icon instead?