### 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.
for (int i = 0; i < extensions.size(); i++) {
				file->add_filter("*." + extensions[i], extensions[i].to_upper());
			}
			Node *scene = editor_data.get_edited_scene_root();
			if (scene) {
				file->set_current_path(scene->get_scene_file_path());
			};
			file->set_title(p_option == FILE_OPEN_SCENE ? TTR("Open Scene") : TTR("Open Base Scene"));
			file->popup_file_dialog();
		} break;
		case FILE_QUICK_OPEN: {
			quick_open->popup_dialog("Resource", true);
			quick_open->set_title(TTR("Quick Open..."));
		} break;
		case FILE_QUICK_OPEN_SCENE: {
			quick_open->popup_dialog("PackedScene", true);
			quick_open->set_title(TTR("Quick Open Scene..."));
		} break;
		case FILE_QUICK_OPEN_SCRIPT: {
			quick_open->popup_dialog("Script", true);
			quick_open->set_title(TTR("Quick Open Script..."));
		} break;
		case FILE_OPEN_PREV: {
			if (previous_scenes.is_empty()) {
				break;
			}
			opening_prev = true;
			open_request(previous_scenes.back()->get());
			previous_scenes.pop_back();
		} break;