Suggestion #1848

My suggestion is making the selltool work on the HSU/BSU blocks. (Huge storage unit/Big Storage Unit) As of right now, many people have huge automated farms with the stb items of slimefun. They end up with millions of items in some HSU and then have to sell it all and it takes a lot of time (sometimes 30 min+ with selltool) Since HSU is like a chest (huge chest) the selltool should be set to work with it. I hope this wouldnt be too hard to make since theres only 1 possible item at a time in those blocks.