Tracking which races you've beaten a mission with

Just a really minor thing, but I’m a bit of a completionist, so I want to beat every mission at every difficulty with every race. At the moment this means manually tracking which races I’ve beaten a mission with, and as a result I feel compelled to stick to one race at a time and not experiment too much, lest I lose track. A slight UI tweak to note which races you’ve beaten each difficulty of each mission with would be very, very welcome.

That would be very helpful indeed.