### 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
keydata.second = v;
								insert_queue_new.append(keydata);
							}
						} break;
						case Animation::TYPE_ROTATION_3D: {
							for (double delta_t = 0.0; delta_t <= anim_len; delta_t += dur_step) {
								Pair<real_t, Variant> keydata;
								keydata.first = delta_t;
								Quaternion v;
								animation->try_rotation_track_interpolate(i, delta_t, &v);
								keydata.second = v;
								insert_queue_new.append(keydata);
							}
						} break;
						case Animation::TYPE_SCALE_3D: {
							for (double delta_t = 0.0; delta_t <= anim_len; delta_t += dur_step) {
								Pair<real_t, Variant> keydata;
								keydata.first = delta_t;
								Vector3 v;
								animation->try_scale_track_interpolate(i, delta_t, &v);
								keydata.second = v;
								insert_queue_new.append(keydata);
							}
						} break;
						case Animation::TYPE_BLEND_SHAPE: {
							for (double delta_t = 0.0; delta_t <= anim_len; delta_t += dur_step) {
								Pair<real_t, Variant> keydata;
								keydata.first = delta_t;
								float v;
								animation->try_blend_shape_track_interpolate(i, delta_t, &v);