As a matter of fact I'm already working on adding a hotkey which takes any trash items in your inventory (trashslots, autotrash, raw ores etc.) and evenly distributes them into nearby machines and chests which accept them. I might add the option to reasearch autotrash earlier for this so you can specifiy which items you need and which not.
The issue with box selection is that this only works for specific planner items but having a planner take up an additional inventory space so you can cleanup your inventory is kind of pointless.
I'm going to finish this hotkey sometime next week, if you want me to add something specific to it tell me :)