### 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 (in_group) {
				draw_line(Vector2(timeline->get_name_limit(), get_size().height), get_size(), linecolor, Math::round(EDSCALE));
			} else {
				draw_line(Vector2(0, get_size().height), get_size(), linecolor, Math::round(EDSCALE));
			}
			if (dropping_at != 0) {
				Color drop_color = get_theme_color(SNAME("accent_color"), EditorStringName(Editor));
				if (dropping_at < 0) {
					draw_line(Vector2(0, 0), Vector2(get_size().width, 0), drop_color, Math::round(EDSCALE));
				} else {
					draw_line(Vector2(0, get_size().height), get_size(), drop_color, Math::round(EDSCALE));
				}
			}
		} break;
		case NOTIFICATION_MOUSE_ENTER:
			hovered = true;
			queue_redraw();
			break;
		case NOTIFICATION_MOUSE_EXIT:
			hovered = false;
			
			hovering_key_idx = -1;
			queue_redraw();
			[[fallthrough]];
		case NOTIFICATION_DRAG_END: {
			cancel_drop();
		} break;
	}
}
int AnimationTrackEdit::get_key_height() const {