### 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

/
if (intFunc) {
			ERR_FAIL_COND(p_ops[0].get_type() != Variant::INT);
			intFunc->set_function((VisualShaderNodeIntFunc::Function)(int)p_ops[0]);
			return;
		}
	}
	
	{
		VisualShaderNodeUIntOp *uintOp = Object::cast_to<VisualShaderNodeUIntOp>(p_node);
		if (uintOp) {
			ERR_FAIL_COND(p_ops[0].get_type() != Variant::INT);
			uintOp->set_operator((VisualShaderNodeUIntOp::Operator)(int)p_ops[0]);
			return;
		}
	}
	
	{
		VisualShaderNodeUIntFunc *uintFunc = Object::cast_to<VisualShaderNodeUIntFunc>(p_node);
		if (uintFunc) {
			ERR_FAIL_COND(p_ops[0].get_type() != Variant::INT);
			uintFunc->set_function((VisualShaderNodeUIntFunc::Function)(int)p_ops[0]);
			return;
		}
	}
	
	{
		VisualShaderNodeTransformOp *matOp = Object::cast_to<VisualShaderNodeTransformOp>(p_node);
		if (matOp) {
			ERR_FAIL_COND(p_ops[0].get_type() != Variant::INT);
			matOp->set_operator((VisualShaderNodeTransformOp::Operator)(int)p_ops[0]);