On the colony panel, when you move goods to/from a carrier, if you press and hold down SHIFT, you can specify how many goods you want to move.
I think it would be good to have a new hotkey:
When you press and hold down SHIFT+CONTROL while moving, it should move ALL the available goods from/to a carrier of that type (which is currently dragged by the mouse).
Implemented in git.ff2734b, contirbuted by Brian Kim, Louise Zhang, Seongmin Park and Michael Jeffers