### 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
animation = p_animation;
	read_only = p_read_only;
	track = p_track;
	queue_redraw();
	ERR_FAIL_INDEX(track, animation->get_track_count());
	node_path = animation->track_get_path(p_track);
	type_icon = _get_key_type_icon();
	selected_icon = get_editor_theme_icon(SNAME("KeySelected"));
}
NodePath AnimationTrackEdit::get_path() const {
	return node_path;
}
Size2 AnimationTrackEdit::get_minimum_size() const {
	Ref<Texture2D> texture = get_editor_theme_icon(SNAME("Object"));
	Ref<Font> font = get_theme_font(SNAME("font"), SNAME("Label"));
	int font_size = get_theme_font_size(SNAME("font_size"), SNAME("Label"));
	int separation = get_theme_constant(SNAME("v_separation"), SNAME("ItemList"));
	int max_h = MAX(texture->get_height(), font->get_height(font_size));
	max_h = MAX(max_h, get_key_height());
	return Vector2(1, max_h + separation);
}
void AnimationTrackEdit::set_timeline(AnimationTimelineEdit *p_timeline) {
	timeline = p_timeline;
	timeline->set_track_edit(this);
	timeline->connect("zoom_changed", callable_mp(this, &AnimationTrackEdit::_zoom_changed));
	timeline->connect("name_limit_changed", callable_mp(this, &AnimationTrackEdit::_zoom_changed));
}
void AnimationTrackEdit::set_editor(AnimationTrackEditor *p_editor) {