Fix bug for FormPanel: If the control is in the content page, the Page.PreInit event will not be raised, but if it's in the normal page, the event can be raised correctly. So we have to find out the reason, when there is enough time.
Fix defect for QueryManager: If the AutoQuery property value is false, it should bind an empty array to the data view control. Especially for GridView control, so that the grid header can be shown.