### 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
undo_redo->add_undo_method(animation.ptr(), "track_remove_key_at_time", p_id.track_idx, time);
		int existing = animation->track_find_key(p_id.track_idx, time, Animation::FIND_MODE_APPROX);
		if (existing != -1) {
			Variant v = animation->track_get_key_value(p_id.track_idx, existing);
			float trans = animation->track_get_key_transition(p_id.track_idx, existing);
			undo_redo->add_undo_method(animation.ptr(), "track_insert_key", p_id.track_idx, time, v, trans);
		}
	}
	if (create_reset_track) {
		Animation *reset_anim = p_reset_anim.ptr();
		for (int i = 0; i < reset_anim->get_track_count(); i++) {
			if (reset_anim->track_get_path(i) == p_id.path) {
				create_reset_track = false;
				break;
			}
		}
		if (create_reset_track) {
			undo_redo->add_do_method(reset_anim, "add_track", p_id.type);
			undo_redo->add_do_method(reset_anim, "track_set_path", p_next_tracks.reset, p_id.path);
			if (p_id.type == Animation::TYPE_VALUE) {
				undo_redo->add_do_method(reset_anim, "value_track_set_update_mode", p_next_tracks.reset, update_mode);
			}
			undo_redo->add_do_method(reset_anim, "track_insert_key", p_next_tracks.reset, 0.0f, value);
			undo_redo->add_undo_method(reset_anim, "remove_track", reset_anim->get_track_count());
			p_next_tracks.reset++;
		}
	}
	return p_next_tracks;
}
void AnimationTrackEditor::show_select_node_warning(bool p_show) {