### 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
double current_zoom_value = timeline->get_zoom()->get_value();
	timeline->get_zoom()->set_value(MAX(0.01, current_zoom_value * p_zoom_factor));
}
void AnimationTrackEditor::_cancel_bezier_edit() {
	bezier_edit->hide();
	scroll->show();
	bezier_edit_icon->set_pressed(false);
}
void AnimationTrackEditor::_bezier_edit(int p_for_track) {
	_clear_selection(); 
	bezier_edit->set_root(root);
	bezier_edit->set_animation_and_track(animation, p_for_track, read_only);
	scroll->hide();
	bezier_edit->show();
	
}
void AnimationTrackEditor::_bezier_track_set_key_handle_mode(Animation *p_anim, int p_track, int p_index, Animation::HandleMode p_mode, Animation::HandleSetMode p_set_mode) {
	if (!p_anim) {
		return;
	}
	p_anim->bezier_track_set_key_handle_mode(p_track, p_index, p_mode, p_set_mode);
}
void AnimationTrackEditor::_anim_duplicate_keys(bool transpose) {