### Godot version

4.2 dev3

### System information

Windows 10.0.19045 - Vulkan (Forward+) - dedicated NVIDIA GeForce GTX 1060 (NVIDIA; 30.0.15.1403) - Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz (8 Threads)

### Issue description

If you have a Method Track with multiple calls to the same method, they are joined together and makes things unreadable:
![image](https://github.com/godotengine/godot/assets/2223172/a2ab8446-28a1-440b-b0d5-5049f5d705b4)
The horizontal line shouldn't be used here. I think it might be a regression.

### Steps to reproduce

1. Add AnimationPlayer
2. Add a Method Track (with Add Track button)
3. Add some key to the track
4. Add another key with the same method

### Minimal reproduction project

N/A
if (get_script_instance()) {
		Variant args[6] = {
			p_object,
			p_type,
			p_property,
			p_hint,
			p_hint_string,
			p_usage
		};
		Variant *argptrs[6] = {
			&args[0],
			&args[1],
			&args[2],
			&args[3],
			&args[4],
			&args[5]
		};
		Callable::CallError ce;
		return Object::cast_to<AnimationTrackEdit>(get_script_instance()->callp("create_value_track_edit", (const Variant **)&argptrs, 6, ce).operator Object *());
	}
	return nullptr;
}
AnimationTrackEdit *AnimationTrackEditPlugin::create_audio_track_edit() {