Render NES / Completions model information in the status bar #277826
Description
When we experiment with new models, it would be useful to allow advanced users to see this. It would be also useful to allow people who don't like the experience they get to opt out of a particular model (the fact that they're part of an experiment with a ppe model should be made visible). We can also use this opt out as a quality signal for the model flight.
For unified model flights, this should allow people to opt out of the unified model flight.