Scene premade instance injection -> setting the root_scene / scene in afterUpdate(...) is wrong

[vatro]

Fix it, see:

svelthree/src/components/Scene.svelte

Lines 521 to 533 in 94f10f7

	$: if (root_scene === undefined) {
	root_scene = get_root_scene(getContext("scene"))
	if (root_scene === scene) {
	// we are the root scene
	root_scene = null
	root_scene_obj.value = root_scene
	scene_obj.value = scene
	} else {
	scene.userData.root_scene = root_scene
	scene_obj.value = scene
	}
	}

svelthree/src/components/Scene.svelte

Lines 1002 to 1012 in 94f10f7

	if ($svelthreeStores[sti].rendererComponent?.mode === "auto") {
	if (root_scene) {
	// prevent an additional component update by not accessing the `scene` prop directly.
	root_scene_obj.value.userData.dirty = true
	$svelthreeStores[sti].rendererComponent.schedule_render_auto(root_scene)
	} else {
	// prevent an additional component update by not accessing the `scene` prop directly.
	scene_obj.value.userData.dirty = true
	$svelthreeStores[sti].rendererComponent.schedule_render_auto(scene)
	}
	}

root_scene_obj.value is undefined in afterUpdate(...) on instance injection.
... also the comments should be fixed.

[vatro]

... also: scene_obj.value has to be updated on instance change!