Ported and improved Sayu's awesome alt-click stat panel.

Alt-clicking a tile will bring up a list of the objects on it in a stat panel- these can be interacted with normally, with both left and right clicks.
This is particularly useful for getting specific items from lockers.
![wicked shit](http://i.imgur.com/On3CSM8.png)

All meaningful credit goes to Sayu for this!

This probably needs some more thorough testing before merging, I'd expect a couple of edge cases to come up somewhere.