static/ext/src/ux/LiveSearchGridPanel.js
function() {
        var me = this;
        me.callParent(arguments);
        me.textField = me.down('textfield[name=searchField]');
        me.statusBar = me.down('statusbar[name=searchStatusBar]');
    }
function() {
        var me = this;
        me.callParent(arguments);
        me.textField = me.down('textfield[name=searchField]');
        me.statusBar = me.down('statusbar[name=searchStatusBar]');
    }
afterRender override: it adds textfield and statusbar reference and start monitoring keydown events in textfield input