### 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

/
GDCLASS(VisualShaderNodePluginDefaultEditor, VBoxContainer);
	VisualShaderEditor *editor = nullptr;
	Ref<Resource> parent_resource;
	int node_id = 0;
	VisualShader::Type shader_type;
public:
	void _property_changed(const String &p_property, const Variant &p_value, const String &p_field = "", bool p_changing = false) {