### 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 (setting || animation != p_anim) {
		return;
	}
	notify_change();
}
void AnimationMultiTrackKeyEdit::_key_ofs_changed(const Ref<Animation> &p_anim, float from, float to) {
	if (animation != p_anim) {
		return;
	}
	for (const KeyValue<int, List<float>> &E : key_ofs_map) {
		int key = 0;
		for (const float &key_ofs : E.value) {
			if (from != key_ofs) {
				key++;
				continue;
			}
			int track = E.key;
			key_ofs_map[track][key] = to;
			if (setting) {
				return;
			}
			notify_change();
			return;
		}
	}
}
bool AnimationMultiTrackKeyEdit::_set(const StringName &p_name, const Variant &p_value) {