Workaround : Ext JS 5.1.0 checkboxmodel 'deselect' defect

ExtJS 5.1.0 is having a bug in checkboxmodel. While using checkbox model, it is not firing deselect/selection change when the model is 'MULTI' which is a default value.

Use following snippet to make it work.

 selModel: {
          selType: 'checkboxmodel' 
          model : 'SIMPLE'

}