Also don't show the undo hint when we're in the undo zone.
Now things look unchanged when we're in the undo zone. Relax, nothing will change.
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-- a hint for original location of node, to help put it back
App.color{r=0.8, g=0.8, b=0.8}
love.graphics.rectangle('fill', vx(Move.oldx), vy(Move.oldy), scale(Move.node.w), scale(Move.node.h))
-- a hint about the amount of padding we're going to clear when we set the node down