### Godot version

4.1.beta (7b1387ff2)

### System information

Mageia 9, Linux

### Issue description

When opening an empty project in latest `master`, I get these errors:
```
ERROR: Index p_idx = -1 is out of bounds (edited_scene.size() = 1).
   at: get_scene_path (editor/scu/../editor_data.cpp:880)
ERROR: Index p_idx = -1 is out of bounds (edited_scene.size() = 1).
   at: check_and_update_scene (editor/scu/../editor_data.cpp:683)
ERROR: Index p_idx = -1 is out of bounds (edited_scene.size() = 1).
   at: set_edited_scene (editor/scu/../editor_data.cpp:745)
```

Possibly related to recent changes to restore past sessions, but there's nothing to restore in this case?

### Steps to reproduce

- Create a new project, edit it
- Quit to project manager
- Re-open the newly created project -> errors

### Minimal reproduction project

Empty project.
settings_changed = true;
}
EditorNode::EditorNode() {
	EditorPropertyNameProcessor *epnp = memnew(EditorPropertyNameProcessor);
	add_child(epnp);
	PortableCompressedTexture2D::set_keep_all_compressed_buffers(true);
	Input::get_singleton()->set_use_accumulated_input(true);
	Resource::_get_local_scene_func = _resource_get_edited_scene;
	RenderingServer::get_singleton()->set_debug_generate_wireframes(true);
	AudioServer::get_singleton()->set_enable_tagging_used_audio_streams(true);
	
	if (NavigationServer3D::get_singleton()->get_debug_enabled()) {
		NavigationServer3D::get_singleton()->set_active(true);
	} else {
		NavigationServer3D::get_singleton()->set_active(false);
	}
	
	PhysicsServer3D::get_singleton()->set_active(false);
	PhysicsServer2D::get_singleton()->set_active(false);
	
	ScriptServer::set_scripting_enabled(false);
	EditorHelp::generate_doc(); 
	SceneState::set_disable_placeholders(true);
	ResourceLoader::clear_translation_remaps(); 
	ResourceLoader::clear_path_remaps();
	ResourceLoader::set_create_missing_resources_if_class_unavailable(true);
	Input *id = Input::get_singleton();
	if (id) {