Reverse displayFields Array before configuring the columns of the result list. Now the displayed columns are in the same order as defined in the query configuration file.

/**
 * Store for Zusatzwerte
 */
Ext.define('Lada.store.Zusatzwerte', {
    extend: 'Ext.data.Store',
    autoLoad: true,
    model: 'Lada.model.Zusatzwert'
});