Add a way to disable the welcome screen from code

[jleibs]

While the welcome screen makes sense for users that are primary users of Rerun, it can be confusing to "secondary users", when Rerun is used as part of a visualizer spawned by another application.

We already have a menu option to disable this, but there's no way to set it from code.

[emilk]

You want to set this as an init argument, or as a blueprint option, or what?

[jleibs]

Maybe even just an argument to spawn?

Doing it from blueprint would be nice too, but introduces some weird edge-cases when multiple blueprints conflict on what to do.

Would also like to be able to do it from Gradio, so a url-param would be nice there as well.

[Wumpf]

@jleibs now that https://github.com/rerun-io/rerun/pull/6262 is in, what is still missing? (that pr says it was partially addressed)

EDIT: Answer: unclear if current solution is fine long term. There's no way to do this from blueprint right now, it can only be done from spawn

[pd-nisse]

@jleibs thanks for spawn argument, that works well for us. I noticed it isn't supported in serve, though, which is what we use in headless mode. Any chance to expand that argument in the next version?