Detach Shadow

[Sheff]

Sometimes, it would be helpful to detach a shadow and edit its shape independent of the object that was used to create it. I would like to be able to hit a button and then have the shadow become an object that retains the transparency and feathering that it initially had.

Also, I would like a new shadow type called inner shadow or inner glow where the shadow comes inside the object rather on the outside. Think of this as the opposite of glow as it currently exists.