### 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.
singleton->progress_hb->add_task(p_task, p_label, p_steps);
}
void EditorNode::progress_task_step_bg(const String &p_task, int p_step) {
	singleton->progress_hb->task_step(p_task, p_step);
}
void EditorNode::progress_end_task_bg(const String &p_task) {
	singleton->progress_hb->end_task(p_task);
}
String EditorNode::_get_system_info() const {
	String distribution_name = OS::get_singleton()->get_distribution_name();
	if (distribution_name.is_empty()) {
		distribution_name = OS::get_singleton()->get_name();
	}
	if (distribution_name.is_empty()) {
		distribution_name = "Other";
	}
	const String distribution_version = OS::get_singleton()->get_version();
	String godot_version = "Godot v" + String(VERSION_FULL_CONFIG);
	if (String(VERSION_BUILD) != "official") {
		String hash = String(VERSION_HASH);
		hash = hash.is_empty() ? String("unknown") : vformat("(%s)", hash.left(9));
		godot_version += " " + hash;
	}
	String driver_name = GLOBAL_GET("rendering/rendering_device/driver");
	String rendering_method = GLOBAL_GET("rendering/renderer/rendering_method");
	const String rendering_device_name = RenderingServer::get_singleton()->get_video_adapter_name();
	RenderingDevice::DeviceType device_type = RenderingServer::get_singleton()->get_video_adapter_type();
	String device_type_string;
	switch (device_type) {