### Godot version

4.0 fb10f45

### System information

Windows 10 x64

### Issue description

Behold, empty TileSet editor, with no TileMap node nor bottom button visible:
![image](https://github.com/godotengine/godot/assets/2223172/0f052770-4946-40eb-a790-a995dbe2599c)
Regression from #72277 (most likely, I didn't test)

### Steps to reproduce

1. Add some Node to your scene
2. Add a TileMap as a child
3. Select TileMap
4. Fold its parent in the scene tree
5. Restart the editor
6. The TileMap selection is restored and so is the folded node, resulting in a weird paradox

### Minimal reproduction project

N/A
for (EditedShader &edited_shader : edited_shaders) {
		if (edited_shader.shader == p_for_shader) {
			return edited_shader.visual_shader_editor;
		}
	}
	return nullptr;
}
void ShaderEditorPlugin::set_window_layout(Ref<ConfigFile> p_layout) {
	if (EDITOR_GET("interface/multi_window/restore_windows_on_load") && window_wrapper->is_window_available() && p_layout->has_section_key("ShaderEditor", "window_rect")) {
		window_wrapper->restore_window_from_saved_position(
				p_layout->get_value("ShaderEditor", "window_rect", Rect2i()),
				p_layout->get_value("ShaderEditor", "window_screen", -1),
				p_layout->get_value("ShaderEditor", "window_screen_rect", Rect2i()));
	} else {
		window_wrapper->set_window_enabled(false);
	}
	if (!bool(EDITOR_GET("editors/shader_editor/behavior/files/restore_shaders_on_load"))) {
		return;
	}
	if (!p_layout->has_section("ShaderEditor")) {
		return;
	}
	if (!p_layout->has_section_key("ShaderEditor", "open_shaders") ||
			!p_layout->has_section_key("ShaderEditor", "selected_shader")) {
		return;
	}
	Array shaders = p_layout->get_value("ShaderEditor", "open_shaders");