Why have differentiation between weapons/ammo/items in inventory anyway?

as an add to the multi-specialized-toolbar thing:

-you can't "place" personal weapons or ammo on the ground except by dropping it
-when fighting, there's likely very little you're also paying attention to, so why have the ...

Generally love the proposed changes. A few things:

-make sure the inventory doesn't jump when switching tabs. Doesn't really matter if that's done by sizing the tabs the same or having it align left to me.
-some indication of currently equipped weapon for the surprise monstrous biter attack ...