Make processes toolbelt better

Needs feature parity with Terminal's "Show Inspector".

Thanks for putting this on your to-do list! As I mentioned on Twitter, Terminal.app's Inspector is incredibly useful for monitoring or debugging large scripts or compilations. If something stalls or you're unsure of what's happening with a script, it's often very helpful to see the tree of processes, their children, and their arguments.

Milestone changed to Feature Complete 3.2