I do not totally understand, why between C5.5 and C12 Steinberg decided to remove this option for input channels and placed it rather hidden under that small triangle button MixConsole menu at the top instead, when they still have it for other regular tracks, like audio tracks…sorry, this is wrong!
A bit of consistency here would be pretty needed: all the tracks in MixConsole should have the option LOAD/SAVE TRACK for rmb (right-mouse-button), definitely.