### 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
_clear_key_edit();
	if (!animation.is_valid()) {
		return;
	}
	if (selection.size() == 1) {
		key_edit = memnew(AnimationTrackKeyEdit);
		key_edit->animation = animation;
		key_edit->animation_read_only = read_only;
		key_edit->track = selection.front()->key().track;
		key_edit->use_fps = timeline->is_using_fps();
		int key_id = selection.front()->key().key;
		if (key_id >= animation->track_get_key_count(key_edit->track)) {
			_clear_key_edit();
			return; 
		}
		float ofs = animation->track_get_key_time(key_edit->track, key_id);
		key_edit->key_ofs = ofs;
		key_edit->root_path = root;
		NodePath np;
		key_edit->hint = _find_hint_for_track(key_edit->track, np);
		key_edit->base = np;
		EditorNode::get_singleton()->push_item(key_edit);
	} else if (selection.size() > 1) {
		multi_key_edit = memnew(AnimationMultiTrackKeyEdit);