Support device combos

[rockfordlhotka]

For my usage pattern it would be ideal if this app supported play/record device combos.

I almost always switch between my headset (mic/speaker) and my PC speaker with my Rode Podcaster mic on my desktop, or between my headset (mic/speaker) and my PC speaker/mic on my Surface.

I almost never switch only the playback or the record device - can't remember the last time I did such a thing actually.

So having Audio Switcher support play/record device pairs as a single option would be really ideal.