### 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
int sep = text.find(":");
					if (sep != -1) {
						text = text.substr(sep + 1, text.length());
					}
				}
				String track_type;
				switch (animation->track_get_type(i)) {
					case Animation::TYPE_POSITION_3D:
						track_type = TTR("Position");
						break;
					case Animation::TYPE_ROTATION_3D:
						track_type = TTR("Rotation");
						break;
					case Animation::TYPE_SCALE_3D:
						track_type = TTR("Scale");
						break;
					case Animation::TYPE_BLEND_SHAPE:
						track_type = TTR("BlendShape");
						break;
					case Animation::TYPE_METHOD:
						track_type = TTR("Methods");
						break;
					case Animation::TYPE_BEZIER:
						track_type = TTR("Bezier");
						break;
					case Animation::TYPE_AUDIO:
						track_type = TTR("Audio");
						break;
					default: {
					};