edit:
it was so blatantly simple ... I shouldn't have picked up the chantrelle.
Thanks a lot anyways

(another wiki edit coming in!)
still stuck with the glowing-green question though
original post:
I'm afraid I still haven't been able to do it:
What I'm currently doing:
I'm standing next to the cupboard, and I have it opened. It contains some chantrelles, and I have several more in my inventory. I left-click a chantrelle in my inventory, and shift-scroll the mousewheel over the container screen.
I've done pretty much all variants I can think of: clicking the mousewheel, doing it over the cupboard sprite, trying to do it in reverse (cupboard to inventory), but it all just does nothing
On a related note, when I CONTROL+Right-click a cupboard, it starts glowing green. Is this related to this, or some other behaviour?