Rated 5 out of 5 stars
What's implemented works best.
I have a related problem: I have lots and lots of folders in a hierarchy. When I drag things into them the hierarchy expands and a long list ensues.
I wish there was a mode that would allow me to drag messages into a subfolder and then have the folder structure auto contract back.
(now it only auto-contracts if i hover over a folder structure but "change my mind" so all the components seem to be in place...