[Request] Minimum volume for auto traders

[Xkuka]

It is awesome we got the option to chose the wares for auto traders. Unfortunately this option is not as useful as it seems at first glance.
On a big complex with many employed trading ships it is kinda nice to have the option to specialize some traders, but the auto assignment isn't too bad.
What is bugging me is when I see a L trader hauling 100 food stuffs, while I actually have 60 courier ships assigned to the same station.
So what is missing is an option to set the Minimum used cargo space. With that option there would be no need to fiddle around with ware selections, as the L traders automatically only go for trade runs with sufficient volume.

This option is already available in trading mods. But it would be nice to have that in vanilla too.