Maybe the build server URL could be defined in game.project instead of preferences?
I think this is a preference for the entire workflow, not per-project.
Remember that the default is the live server, and very few users have reason to change that.
Devs should bloody well remember when they’ve been playing with staging server fire!
I think it’s a visibility issue, and perhaps we can output a large banner in the console telling the users that they’re using the beta server.