Suggestion: Adding PTZ options for vMix

[xemles]

Would be great to add an option for PTZ for vMix.

The logic is pretty much straightforward:
Having multiple PTZ positions set, and "prepare to switch" before actually CUEing so that we don't see the movement (probably delay the switch by a second depending on if it's already on the position?).

The thing right now is that we can use PTZ cameras but it doesn't switch to the PTZ position within containers as vMix doesn't trigger the PTZ position on such overlays.