More detailed CPU/GPU usage configuration

[Aculnay]

I think it would be great, if you could enhance the CPU/GPU usage configuration. What i thought about is, that you can configure the usage for CPU/GPU while the pc is used and set alternative values for when the pc is not used. For example: When the pc is used i would allow a CPU usage of 50% and no GPU usage. But when the pc isnt used Boinc could use 100% of the CPU and also the GPU. It would be also awesome if you could configure the GPU load.