Ability to Activate Stages in Proof Viewer

[#1]

It would be much more efficient if the Proof Owner was able to activate stages within the Proof View "Workflow". Right now, to activate stages within a workflow you have to manually find the proof via Project > Documents > and then activate stages through "Proof Details". If we were able to seamlessly progress the piece while reviewing the proof, it would make it much more time-efficient.