### 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
EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
	undo_redo->create_action(TTR("Animation Insert Key"));
	Ref<Animation> reset_anim;
	if (p_reset_wanted) {
		reset_anim = _create_and_get_reset_animation();
	}
	TrackIndices next_tracks(animation.ptr(), reset_anim.ptr());
	bool advance = false;
	while (insert_data.size()) {
		if (insert_data.front()->get().advance) {
			advance = true;
		}
		next_tracks = _confirm_insert(insert_data.front()->get(), next_tracks, p_reset_wanted, reset_anim, p_create_beziers);
		insert_data.pop_front();
	}
	undo_redo->commit_action();
	if (advance) {
		_edit_menu_pressed(EDIT_GOTO_NEXT_STEP_TIMELINE_ONLY);
	}
}
void AnimationTrackEditor::insert_transform_key(Node3D *p_node, const String &p_sub, const Animation::TrackType p_type, const Variant p_value) {