### 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
case Animation::TYPE_ANIMATION: {
			String animations;
			if (root_path && root_path->has_node(animation->track_get_path(track))) {
				AnimationPlayer *ap = Object::cast_to<AnimationPlayer>(root_path->get_node(animation->track_get_path(track)));
				if (ap) {
					List<StringName> anims;
					ap->get_animation_list(&anims);
					for (const StringName &E : anims) {
						if (!animations.is_empty()) {
							animations += ",";
						}
						animations += String(E);
					}
				}
			}
			if (!animations.is_empty()) {
				animations += ",";
			}
			animations += "[stop]";
			p_list->push_back(PropertyInfo(Variant::STRING_NAME, PNAME("animation"), PROPERTY_HINT_ENUM, animations));
		} break;
	}
	if (animation->track_get_type(track) == Animation::TYPE_VALUE) {
		p_list->push_back(PropertyInfo(Variant::FLOAT, PNAME("easing"), PROPERTY_HINT_EXP_EASING));
	}
}
void AnimationTrackKeyEdit::notify_change() {
	notify_property_list_changed();
}
Node *AnimationTrackKeyEdit::get_root_path() {