Occurs when an end-user pulls the grid down to refresh its content.
The PullToRefresh event handler receives an argument of the EventArgs type.
The GridControl's pull-to-refresh feature allows end-users to request a grid content update with the pull-down gesture.
To enable this functionality, set the GridControl.IsPullToRefreshEnabled property to true. Then, either handle the PullToRefresh event, or define a refresh command in a view model and bind it to the grid using the GridControl.PullToRefreshCommand property.