### 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
for (int i = 0; i < track_clipboard.size(); i++) {
				undo_redo->add_do_method(animation.ptr(), "add_track", track_clipboard[i].track_type);
				Node *exists = nullptr;
				NodePath path = track_clipboard[i].base_path;
				if (root) {
					NodePath np = track_clipboard[i].full_path;
					exists = root->get_node(np);
					if (exists) {
						path = NodePath(root->get_path_to(exists).get_names(), track_clipboard[i].full_path.get_subnames(), false);
					}
				}
				undo_redo->add_do_method(animation.ptr(), "track_set_path", base_track, path);
				undo_redo->add_do_method(animation.ptr(), "track_set_interpolation_type", base_track, track_clipboard[i].interp_type);
				undo_redo->add_do_method(animation.ptr(), "track_set_interpolation_loop_wrap", base_track, track_clipboard[i].loop_wrap);
				undo_redo->add_do_method(animation.ptr(), "track_set_enabled", base_track, track_clipboard[i].enabled);
				if (track_clipboard[i].track_type == Animation::TYPE_VALUE) {
					undo_redo->add_do_method(animation.ptr(), "value_track_set_update_mode", base_track, track_clipboard[i].update_mode);
				}
				if (track_clipboard[i].track_type == Animation::TYPE_AUDIO) {
					undo_redo->add_do_method(animation.ptr(), "audio_track_set_use_blend", base_track, track_clipboard[i].use_blend);
				}
				for (int j = 0; j < track_clipboard[i].keys.size(); j++) {
					undo_redo->add_do_method(animation.ptr(), "track_insert_key", base_track, track_clipboard[i].keys[j].time, track_clipboard[i].keys[j].value, track_clipboard[i].keys[j].transition);
				}
				undo_redo->add_undo_method(animation.ptr(), "remove_track", animation->get_track_count());
				base_track++;
			}
			undo_redo->commit_action();
		} break;
		case EDIT_SCALE_SELECTION: