Bug 142928 Item from library is changed to a report design item after revert to report item
Details: Item from library is changed to a report design item after revert to report item. Setp: 1.New a template. 2.Use a libary contain a label. 3.Drop the label from library explorer into layout. 4.Change the label to template item. 5.Revert the template item to report item. Actual result: The label is become a report item, but a item from library. Please see the attach image. Exception result: The lable is revert a item from library.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/views/DefaultNodeProvider.java
return DEUtil.getDisplayLabel( model );
	}
	/**
	 * Gets the children element of the given model using visitor.
	 * 
	 * @param model
	 *            the model
	 */
	public Object[] getChildren( Object model )
	{
		if ( model instanceof ReportElementModel )
		{
			if ( ( (ReportElementModel) model ).getSlotHandle( ) != null )
			{
				Object[] children = this.getChildrenBySlotHandle( ( (ReportElementModel) model ).getSlotHandle( ) );
				if ( comparator != null )
				{
					Arrays.sort( children, comparator );
				}
				return children;
			}
		}
		return new Object[]{};
	}
	public Object getParent( Object model )
	{
		if ( model instanceof ReportElementModel )
		{
			return ( (ReportElementModel) model ).getElementHandle( );
		}