Safe mode in Presenter to allow 2nd PC to be editing cues

It would be great to have a mode in Presenter to allow edits & additions to cues without affecting the live 'show'. The use case is a 2nd person on a different PC running Presenter, making changes to the future cues live. It would be great to be certain you could not accidentally click on a cue, rather than the edit symbol, and upset the service.

Clicking a cue on the second computer won't affect the one that is presenting. This would only happen if you were editing from the same computer you are presenting from.