Give upgrade items from raiding/weekly turn ins a different color/sprite.

Ok, I'll be upfront. I'm an idiot and thought my Deep Gobdip was an Alchemist Potion gotten through a venture. Why did I think that? These have been thrown at my face while leveling an alt. (Yes people level alts.)

I'm not going to reclaim this item, but upon examining some of the upgrade items, it dawned upon me that these REALLY have to be changed, lest someone else makes the stupid mistake I made.

I've put a image below to give an example how much they look alike to the potions an Alchemist makes. The other re-used icons are ok, as you sort of know that these are not some random item that gets thrown at your head about 50 times while leveling.
http://imgur.com/vyEJNDw.png