Grid with Paging Toolbar Dirty flag

[shimith]

I have bind Grid with few records on loading page, While checking Grid has any Dirty (without doing any changes)
on Paging Toolbar number Field showing isDirty True.

How to make by default it is false ?
after refresh or load Grid, it should be (isDirty) false flag

I have used this function for check any dirty

var hasDirtyChild = function() {

var grid = App.GridPanel1;
Ext.each(grid.query('*'), function (item) {
if (item.isDirty && item.isDirty()) {
ret = true;
}
});
}