allowEmptyValue in grid selectItem

[senordhuff]

I'm trying to figure out how to allowEmptyValue in a ListGrid selectItem.

I tried to edit the continent field on this example to allow an emptyValue but that doesn't work. So, how do you do it?

http://www.smartclient.com/#editByCell

isc.ListGrid.create({
    ID: "countryList",
    width:550, height:224, alternateRecordStyles:true, cellHeight:22,
    // use server-side dataSource so edits are retained across page transitions
    dataSource: countryDS,
    // display a subset of fields from the datasource
    fields:[
        {name:"countryCode", title:"Flag", width:40, type:"image", imageURLPrefix:"flags/16/", imageURLSuffix:".png", canEdit:false},
        {name:"countryName"},
        {name:"continent", allowEmptyValue:true},
        {name:"member_g8"},
        {name:"population", formatCellValue:"isc.NumberUtil.toUSString(value)"},
        {name:"independence"}
    ],
    autoFetchData: true,
    canEdit: true,
    editEvent: "click",
    editByCell: true
})

[Isomorphic]

Set it via listGridField.editorProperties:

{
  name:"continent", 
  editorProperties : { allowEmptyValue : true }
},