Display 'summed' waveform/graphic on a group tracks.

[AlexJoKeys]

I think it would be great to display some type of waveform on group tracks/channels when looking at arrange view.

E.G. say if you are mixing a large project with LOTS of individual instrument tracks e.g. strings, drums, horns.etc and each instrumental family has its own group -
Its very hard to see where you are in the arrangement without having to keep expanding some of the groups..etc...

*Yes markers could be used but if you have stems for an entire hour set, it becomes time consuming to go and drop those all in...