See equpped item stats window when operating with inventory.

So we can compare if inventory item is better or worse than equipped one. I.e. I move mouse cursor over the Helmet of WTF in my inventory and see its stats, but to compare it with equipped Helmet of OMG I need to move my mouse over it and try to remember stats of WTF, because it was, like, 2 seconds ago and I already forgot 'em. =)