public function postAdd(Request $request)
 {
     if (!ACL::hasPermission('commonQuestions', 'add')) {
         return redirect(route('commonQuestions'))->withErrors(['Você não tem permissão para adicionar.']);
     }
     $this->validate($request, ['question' => 'required|max:100', 'answer' => 'required'], ['question.required' => 'Informe a pergunta', 'question.max' => 'A pergunta não pode passar de :max caracteres', 'answer.required' => 'Informe a resposta']);
     $lastSortorder = 0;
     $last = CommonQuestions::orderBy('sortorder', 'DESC')->addSelect('sortorder')->first();
     if (count($last) > 0) {
         $lastSortorder = $last->sortorder;
     }
     $text = new CommonQuestions();
     $text->question = $request->question;
     $text->answer = $request->answer;
     $text->sortorder = $lastSortorder + 1;
     $text->save();
     $success = "Pergunta adicionada com sucesso.";
     return redirect(route('commonQuestions'))->with(compact('success'));
 }