Improve "No meshes to bake" LightmapGI error dialog in the editor

[Calinou]

The error dialog now gives advice on the steps to follow to enable lightmapping support on imported scenes, primitive meshes and CSG meshes.

The old message referred to a property that was removed in Godot 4.0 (in fact, it may never have existed under the precise name stated in the dialog).

Preview

[Repiteo]

I'm now realizing how unfamiliar I really am with TTR & its expectations. Will translations for these adjusted options be added over time at a later point?

In any case, codestyle checks out 👍

[akien-mga]

I'm now realizing how unfamiliar I really am with TTR & its expectations. Will translations for these adjusted options be added over time at a later point?

TTR strings are extracted manually via a Python script in https://github.com/godotengine/godot-editor-l10n.

I run these updates roughly once per month (though I'm a month behind now due to being on leave), which basically implies:

• Grabbing new translated strings from Weblate
• Updating source strings from Godot master
• Merging both together
• Committing the updated strings to Godot
• Pushing the new state to Weblate with new strings to translate

[adamscott]

Thanks for the explanation @akien-mga, I didn't know the whole process!

[adamscott]

This makes me think we should really have dedicated articles inside the editor for these kind of things. Like, this pop up is awfully verbose, but in a built-in documentation article, it would be awesome.

[Repiteo]

Thanks!

[Calinou]

This makes me think we should really have dedicated articles inside the editor for these kind of things. Like, this pop up is awfully verbose, but in a built-in documentation article, it would be awesome.

We can have the docs link to various manual pages, but I'm not sure if we should duplicate the whole page inside the editor. While this would allow for offline access, it would also increase the workload for translators a lot while also needing to keep both copies in sync.