Dbconfigadmin

@kalbermattenm : You'll probably kill me for this major revision in one chunk, but could you please review ?
thanks!!!
there is a lot of commented code in admin_functions.py because in a first step I did not yet implement the filtering there
If you want to be geeky, you could get rid of this line and simply:
```javascript
return new Ext.FormPanel({
    id: 'formulaire_saisie',
    title: 'Saisie des règlements',
    .....
}
```