### 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
if (!animation.is_valid()) {
		return;
	}
	if (p_x < p_clip_left || p_x > p_clip_right) {
		return;
	}
	Ref<Texture2D> icon_to_draw = p_selected ? selected_icon : type_icon;
	if (animation->track_get_type(track) == Animation::TYPE_VALUE && !Math::is_equal_approx(animation->track_get_key_transition(track, p_index), real_t(1.0))) {
		
		icon_to_draw = get_editor_theme_icon(p_selected ? SNAME("KeyEasedSelected") : SNAME("KeyValueEased"));
	}
	
	if (!p_selected && animation->track_get_type(track) == Animation::TYPE_VALUE) {
		const Variant &v = animation->track_get_key_value(track, p_index);
		Variant::Type valid_type = Variant::NIL;
		if (!_is_value_key_valid(v, valid_type)) {
			icon_to_draw = get_editor_theme_icon(SNAME("KeyInvalid"));
		}
	}
	Vector2 ofs(p_x - icon_to_draw->get_width() / 2, int(get_size().height - icon_to_draw->get_height()) / 2);
	if (animation->track_get_type(track) == Animation::TYPE_METHOD) {
		Ref<Font> font = get_theme_font(SNAME("font"), SNAME("Label"));
		int font_size = get_theme_font_size(SNAME("font_size"), SNAME("Label"));
		Color color = get_theme_color(SNAME("font_color"), SNAME("Label"));
		color.a = 0.5;
		Dictionary d = animation->track_get_key_value(track, p_index);