var popup = new Ext.Panel({
                                            floating: true,
                                            modal: true,
                                            centered:true,
                                            width:300,
                                            height:200,
                                            scroll: 'vertical',
                                            items: [
                                                {
                                                    xtype:'list',
                                                    store: settingsStore,
                                                    itemTpl: '<div>{label}</div>'
                                                }
                                            ],
                                            listeners: {
                                                itemtap: function(list, idx, item, e){
                                                    popup.hide();
                                                }
                                            },
                                        });