extjs - Panel leaving white space when Scrollbar appears -


i'm building application using ext.js, , built grid panel, , i'm loading data every 14 seconds. when scrollbar appears on panel, appears white space i'm trying remove don't know how, tried overwrite id contains timeline , change color, didn't work because ext.js generated css code again , every changes disappeared.

demo
enter image description here

is possible hide white space?

my code:

ext.define('es.view.layout.menu.menu', {    extend: 'ext.grid.panel',    alias: 'widget.timelinebar',    controller: 'menu',    viewmodel: 'menu',    autoscroll: true,      title: 'timeline',    bodystyle: 'background: #2b5876;',    store: {      type: 'timeline'    },    columns: {      border: false,        defaults: {        hovercls: ''      },        items: [{          text: locale.time,          flex: 1,          dataindex: 'time',          align: 'center',          height: 60        },        {          text: locale.address,          dataindex: 'address',          flex: 1,          align: 'center',          height: 60            listeners: {              click: 'onitemclick'            },        },        {          text: locale.dir,          dataindex: 'dir',          flex: 1,          align: 'right',          height: 60          }      ]    }  });


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