### 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
dock_drag_timer->start();
}
void EditorNode::_dock_split_dragged(int ofs) {
	dock_drag_timer->start();
}
void EditorNode::_load_docks() {
	Ref<ConfigFile> config;
	config.instantiate();
	Error err = config->load(EditorPaths::get_singleton()->get_project_settings_dir().path_join("editor_layout.cfg"));
	if (err != OK) {
		
		if (overridden_default_layout >= 0) {
			_layout_menu_option(overridden_default_layout);
		}
		return;
	}
	_load_docks_from_config(config, "docks");
	_load_open_scenes_from_config(config, "EditorNode");
	editor_data.set_plugin_window_layout(config);
}
void EditorNode::_update_dock_slots_visibility(bool p_keep_selected_tabs) {