`headless_defaults` example displays an empty window

[LegNeato]

Bevy version

518408dfdaa8884ba86a71512de2a7d57848413d

What you did

Run cargo run --example headless_defaults

What went wrong

It isn't headless...a window is displayed:

I expected no window to be displayed.

[DJMcNab]

The examples readme says that the example is:

An application that runs with default plugins, but without an actual renderer.

The purpose of the example is to test that everything works if no wgpu backends are set, which is required because

This issue and the other comment (#3155 (comment)) suggests that people are struggling to understand this example, so it could probably do with a rename - maybe no_renderer?
As far as I can tell, there was no discussion of this in #3439 - @Shatur do you have any thoughts on the name?

[Shatur]

so it could probably do with a rename - maybe no_renderer

Yes, it makes more sense. And I think we also should note in the example description that the window will be present.

[LegNeato]

Cool, will do.