Make more current packs clutter available to be placed in wall shelves

It is a huge annoyance for me when I am building (and I am currently rebuilding every lot in every world, so am stuck with this constantly).

I do use the moo and up and down keys (with alt to get them positioned decently) but this leaves the items suspended in mid-air when you play and the walls drop. I therefore tend to only use that technique on outside walls which I know will not drop when I play cos floating objects are just too weird!

I agree with @Simalleyaile if they can't fix the past ones (which would be a huge shame) at least make sure future stuff can go on the shelves.