### Godot version

v4.2.beta2.official [f8818f85e]

### System information

Windows 10, 64bit

### Issue description

Some times can't add node in visualshader editor

### Steps to reproduce

1. Open a VisualShader file for edit.
2. Click the `Add Node...` button, it will popup menu, it is OK.
3. Direct close the menu.
4. Clikd the `Add Node...` again, the menu can't popup.
![GIF](https://github.com/godotengine/godot/assets/35988767/1326c63e-3e05-4423-9ec7-7ce305b3f4f5)

### Minimal reproduction project

/
VisualShader::Type type = VisualShader::Type(p_type);
	List<VisualShader::Connection> conns;
	visual_shader->get_node_connections(type, &conns);
	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
	for (const int &F : p_nodes) {
		for (const VisualShader::Connection &E : conns) {
			if (E.from_node == F || E.to_node == F) {
				undo_redo->add_do_method(graph_plugin.ptr(), "disconnect_nodes", type, E.from_node, E.from_port, E.to_node, E.to_port);
			}
		}
	}
	HashSet<String> parameter_names;
	for (const int &F : p_nodes) {
		Ref<VisualShaderNode> node = visual_shader->get_node(type, F);
		undo_redo->add_do_method(visual_shader.ptr(), "remove_node", type, F);
		undo_redo->add_undo_method(visual_shader.ptr(), "add_node", type, node, visual_shader->get_node_position(type, F), F);
		undo_redo->add_undo_method(graph_plugin.ptr(), "add_node", type, F, false);
		VisualShaderNodeParameter *parameter = Object::cast_to<VisualShaderNodeParameter>(node.ptr());
		if (parameter) {
			parameter_names.insert(parameter->get_parameter_name());
		}
	}
	List<VisualShader::Connection> used_conns;