### 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
for (int i = 0; i < groups.size(); i++) {
		groups[i]->queue_redraw();
	}
}
void AnimationTrackEditor::_animation_changed() {
	if (animation_changing_awaiting_update) {
		return; 
	}
	_check_bezier_exist();
	if (key_edit) {
		if (key_edit->setting) {
			
			if (key_edit->track < track_edits.size()) {
				if (animation->track_get_type(key_edit->track) == Animation::TYPE_BEZIER) {
					bezier_edit->queue_redraw();
				} else {
					track_edits[key_edit->track]->queue_redraw();
				}
			}
			return;
		} else {
			_update_key_edit();
		}
	}
	animation_changing_awaiting_update = true;
	call_deferred(SNAME("_animation_update"));
}
void AnimationTrackEditor::_snap_mode_changed(int p_mode) {