I using Ext JS 2.3.0 and have a GridPanel that looks like this:

I want to expand the width of the column such that the scroll bar is pushed over the extreme right of the panel, thus eliminating the empty space to the right of the scroll bar.
The relevant code is shown below:
var colModel = new Ext.grid.ColumnModel([
{
id: 'name',
header: locale['dialogSearch.column.name'],
sortable: true,
dataIndex: 'name'
}
]);
var selModel = new Ext.grid.RowSelectionModel({singleSelect: false});
this._searchResultsPanel = new Ext.grid.GridPanel({
title: locale['dialogSearch.results.name'],
height: 400,
layout: 'fit',
stripeRows: true,
autoExpandColumn: 'name',
store: this._searchResultsStore,
view: new Ext.grid.GridView(),
colModel: colModel,
selModel: selModel,
hidden: true,
buttonAlign: 'center',
buttons: [
{
text: locale["dialogSearch.button.add"],
width: 50,
handler: function () {
}
},
{
text: locale["dialogSearch.button.cancel"],
width: 50,
handler: function () {
entitySearchWindow.close();
}
}
]
});