### 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
Dictionary d = p_data;
	if (!d.has("type")) {
		return false;
	}
	String type = d["type"];
	if (type != "animation_track") {
		return false;
	}
	
	if (get_editor()->is_grouping_tracks()) {
		String base_path = animation->track_get_path(track);
		base_path = base_path.get_slice(":", 0); 
		if (d["group"] != base_path) {
			return false;
		}
	}
	if (p_point.y < get_size().height / 2) {
		dropping_at = -1;
	} else {
		dropping_at = 1;
	}
	const_cast<AnimationTrackEdit *>(this)->queue_redraw();
	return true;
}
void AnimationTrackEdit::drop_data(const Point2 &p_point, const Variant &p_data) {