[fix] searchtools open on articles & categories views after login

When login for first time if you go to articles or categories views you can see the searchtools filters open. That's because `access` & `level` were initialized to 0. That's not required because both model already cast filters before apply them on the query.

Issue screenshot:
![filters-open](https://f.cloud.github.com/assets/1119272/2209481/a50d8648-998c-11e3-8b0b-e4537f2cecc3.png)