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.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/DesignElementHandle.java
* Returns the handle of module. The returned module must be
	 * <code>ReportDesignHandle</code> or <code>LibraryHandle</code>.
	 * 
	 * @return the handle of module
	 */
	public ModuleHandle getModuleHandle( )
	{
		return (ModuleHandle) getModule( ).getHandle( getModule( ) );
	}
	/**
	 * Returns the element to which this handle is attached.
	 * 
	 * @return The attached element. Will be null if the handle is not attached.
	 */
	public abstract DesignElement getElement( );
	/**
	 * Gets the definition of the element. The definition provides meta-data
	 * about the element, such as its type name, list of defined properties,
	 * list of slots and so on.
	 * 
	 * @return the meta-data definition of the element
	 */
	public IElementDefn getDefn( )
	{
		return getElement( ).getDefn( );
	}
	/**
	 * Returns the value of a property as a generic object. The value is the
	 * internal property value, it is not localized. For a property with the
	 * element reference type, the reference element name is returned.