### 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

/
{
		VisualShaderNodeColorOp *colorOp = Object::cast_to<VisualShaderNodeColorOp>(p_node);
		if (colorOp) {
			ERR_FAIL_COND(p_ops[0].get_type() != Variant::INT);
			colorOp->set_operator((VisualShaderNodeColorOp::Operator)(int)p_ops[0]);
			return;
		}
	}
	
	{
		VisualShaderNodeColorFunc *colorFunc = Object::cast_to<VisualShaderNodeColorFunc>(p_node);
		if (colorFunc) {
			ERR_FAIL_COND(p_ops[0].get_type() != Variant::INT);
			colorFunc->set_function((VisualShaderNodeColorFunc::Function)(int)p_ops[0]);
			return;
		}
	}
	
	{
		VisualShaderNodeIntOp *intOp = Object::cast_to<VisualShaderNodeIntOp>(p_node);
		if (intOp) {
			ERR_FAIL_COND(p_ops[0].get_type() != Variant::INT);
			intOp->set_operator((VisualShaderNodeIntOp::Operator)(int)p_ops[0]);
			return;
		}
	}
	
	{
		VisualShaderNodeIntFunc *intFunc = Object::cast_to<VisualShaderNodeIntFunc>(p_node);