Swap main-faders with cue-sends in mixer view

Doing cue-mixes is not easy. It is really hard to get an overview.
One way to solve this is a swap-view where main faders are the cue-send faders. The meters are the cue-sends. It would also make sense to have cue-mix configuration selections. With that you can have one cue-mix for guitar focus, a other for vocal etc. This will also make it possible to use hardware controllers for quick cue mixes.