### 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
} else {
		hscroll->hide();
		edit->set_disabled(true);
		step->set_block_signals(true);
		step->set_value(0);
		step->set_block_signals(false);
		step->set_read_only(true);
		snap->set_disabled(true);
		snap_mode->set_disabled(true);
		bezier_edit_icon->set_disabled(true);
	}
}
void AnimationTrackEditor::_check_bezier_exist() {
	bool is_exist = false;
	for (int i = 0; i < animation->get_track_count(); i++) {
		if (animation->track_get_type(i) == Animation::TrackType::TYPE_BEZIER) {
			is_exist = true;
			break;
		}
	}
	if (is_exist) {
		bezier_edit_icon->set_disabled(false);
	} else {
		if (bezier_edit->is_visible()) {
			_cancel_bezier_edit();
		}
		bezier_edit_icon->set_disabled(true);
	}
}
Ref<Animation> AnimationTrackEditor::get_current_animation() const {