### Godot version

v4.1.beta1.official [828ec2c5d]

### System information

Godot v4.1.beta1 - Windows 10.0.19045 - Vulkan (Forward+) - dedicated NVIDIA GeForce RTX 2070 SUPER (NVIDIA; 30.0.14.7247) - AMD Ryzen 7 3700X 8-Core Processor (16 Threads)

### Issue description

Converting a project from Godot 3.5 to Godot 4.1 fails to convert the texture references on TouchScreenButton nodes. Before, my TouchScreenButton scene has a Normal and a Pressed texture assigned; after, the scene has no textures assigned!

This seems to be because the converter fails to update the TouchScreenButton node's `normal` and `pressed` properties to `texture_normal` and `texture_pressed`.

Expected behavior is, of course, that the textures convert properly.

### Steps to reproduce

1. Open repro project in Godot 3.5.*. Observe the graphics on the button in `TouchScreenButton.tscn`.
2. Convert the project to Godot 4.1.*. Observe the lack of graphics on the same button.

### Minimal reproduction project

[GD4 Touch Button Convert.zip](https://github.com/godotengine/godot/files/11928549/GD4.Touch.Button.Convert.zip)

if (_is_point_inside(coord)) {
					if (finger_pressed == -1) {
						_press(index);
					}
				} else {
					if (finger_pressed != -1) {
						_release();
					}
				}
			}
		}
	} else {
		if (st) {
			if (st->is_pressed()) {
				const bool can_press = finger_pressed == -1;
				if (!can_press) {
					return; 
				}
				if (_is_point_inside(st->get_position())) {
					_press(st->get_index());
				}
			} else {
				if (st->get_index() == finger_pressed) {
					_release();
				}
			}
		}
	}
}
bool TouchScreenButton::_is_point_inside(const Point2 &p_point) {