Enhancement: Add running log / "Recent Applications"

[epheterson]

Sometimes I see my Mac just switching back to integrated from discrete, and I'm not sure what was using the discrete chip. There's currently no way to look back and see what was just using it.

It'd be cool if there were a log where I could see each time the GPU switched, with a reason as well. Alternatively, a simpler UI could just be a list of the 3 most recent applications that caused the discrete chip to become engaged.

[codykrieger]

Yeah, that could be neat.