[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 even not having applied any filter. 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)