### 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
switch (p_what) {
		case NOTIFICATION_THEME_CHANGED: {
			if (animation.is_null()) {
				return;
			}
			ERR_FAIL_INDEX(track, animation->get_track_count());
			type_icon = _get_key_type_icon();
			selected_icon = get_editor_theme_icon(SNAME("KeySelected"));
		} break;
		case NOTIFICATION_DRAW: {
			if (animation.is_null()) {
				return;
			}
			ERR_FAIL_INDEX(track, animation->get_track_count());
			int limit = timeline->get_name_limit();
			if (track % 2 == 1) {
				
				draw_rect(Rect2(Point2(1 * EDSCALE, 0), get_size() - Size2(1 * EDSCALE, 0)), Color(0.5, 0.5, 0.5, 0.05));
			}
			if (hovered) {
				
				draw_rect(Rect2(Point2(1 * EDSCALE, 0), get_size() - Size2(1 * EDSCALE, 0)), Color(0.5, 0.5, 0.5, 0.1));
			}
			if (has_focus()) {
				Color accent = get_theme_color(SNAME("accent_color"), EditorStringName(Editor));
				accent.a *= 0.7;
				
				draw_style_box(get_theme_stylebox(SNAME("Focus"), EditorStringName(EditorStyles)), Rect2(Point2(1 * EDSCALE, 0), get_size() - Size2(1 * EDSCALE, 0)));