### 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
Dictionary d = p_data;
	if (!d.has("type")) {
		return false;
	}
	if (String(d["type"]) == "shader_list_element") {
		return true;
	}
	if (String(d["type"]) == "files") {
		Vector<String> files = d["files"];
		if (files.size() == 0) {
			return false;
		}
		for (int i = 0; i < files.size(); i++) {
			String file = files[i];
			if (ResourceLoader::exists(file, "Shader")) {
				Ref<Shader> shader = ResourceLoader::load(file);
				if (shader.is_valid()) {
					return true;
				}
			}
			if (ResourceLoader::exists(file, "ShaderInclude")) {
				Ref<ShaderInclude> sinclude = ResourceLoader::load(file);
				if (sinclude.is_valid()) {
					return true;
				}
			}
		}
		return false;
	}
	return false;