### 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
set_animation(Ref<Animation>(), read_only);
}
void AnimationTrackEditor::_name_limit_changed() {
	_redraw_tracks();
}
void AnimationTrackEditor::_timeline_changed(float p_new_pos, bool p_drag, bool p_timeline_only) {
	emit_signal(SNAME("timeline_changed"), p_new_pos, p_drag, p_timeline_only);
}
void AnimationTrackEditor::_track_remove_request(int p_track) {
	_animation_track_remove_request(p_track, animation);
}
void AnimationTrackEditor::_animation_track_remove_request(int p_track, Ref<Animation> p_from_animation) {
	if (p_from_animation->track_is_compressed(p_track)) {
		EditorNode::get_singleton()->show_warning(TTR("Compressed tracks can't be edited or removed. Re-import the animation with compression disabled in order to edit."));
		return;
	}
	int idx = p_track;
	if (idx >= 0 && idx < p_from_animation->get_track_count()) {
		EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
		undo_redo->create_action(TTR("Remove Anim Track"), UndoRedo::MERGE_DISABLE, p_from_animation.ptr());
		
		AnimationPlayer *player = AnimationPlayerEditor::get_singleton()->get_player();
		if (player->has_animation(SceneStringNames::get_singleton()->RESET)) {