Magic Sheet Intensity and Colors to come from active or pending cue

Allow users to switch the source for the Intensity and Colors used on magic sheet elements between the active cue (existing behavior), and the pending cue.  This would give the ability to preview a pending cue In a similar fashion to how Argument3d can be used to preview the pending cue.

If the ability to toggle between these was quick and easy I'd use it as needed to check on the next cue.  Or if screen space allows have a now and next side by side view.