Yettwasezmel 1 ɣef 5 n yetran

sɛur madazilla di Dec. 21, 2015 · aseɣwen yezgan

Wonderful idea, wished it would work OK,
But unfortunately not working. Randomly 'forgets' messages to copy in a subtree.
(I could show the developer screenshots of the differences)
It's more than nothing. It does copy all the subfolders. So the structure is copied at least, then per (sub)folder I copy or move the messages and then remove the duplicates.