### Godot version

v4.0.beta.custom_build [fab9926a9]

### System information

Fedora 37

### Issue description

When creating a new inherited scene, saving the scene (for example with Ctrl+S) defaults to overwriting the scene being inherited, instead of prompting for a location to save to.

### Steps to reproduce

1. Create a new inherited scene
2. Press Ctrl+S

If the scene being inherited is imported (for example from a glTF), an error displays. If the inherited scene is a .tscn or .scn, it gets overridden by an inherited scene that tries to inherit itself, which is impossible and thus corrupt.

### Minimal reproduction project

N/A
bool all_saved = true;
	for (int i = 0; i < editor_data.get_edited_scene_count(); i++) {
		Node *scene = editor_data.get_edited_scene_root(i);
		if (scene) {
			if (!scene->get_scene_file_path().is_empty() && DirAccess::exists(scene->get_scene_file_path().get_base_dir())) {
				if (i != editor_data.get_edited_scene()) {
					_save_scene(scene->get_scene_file_path(), i);
				} else {
					_save_scene_with_preview(scene->get_scene_file_path());
				}
			} else if (!scene->get_scene_file_path().is_empty()) {
				all_saved = false;
			}
		}
	}
	if (!all_saved) {
		show_warning(TTR("Could not save one or more scenes!"), TTR("Save All Scenes"));
	}
	_save_default_environment();
}
void EditorNode::_mark_unsaved_scenes() {