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
List errorDetailList = ErrorDetail.convertExceptionList( exceptionList );
		return errorDetailList;
	}
	/**
	 * Determines if this element can be dropped from its container.
	 * 
	 * @return <code>true</code> if it can be dropped. Returns
	 *         <code>false</code> otherwise.
	 */
	public boolean canDrop( )
	{
		boolean flag = getElement( ).canDrop( );
		if ( !flag )
			return false;
		return !getModule( ).isReadOnly( );
	}
	/**
	 * Determines if this element is editable or not. If the element comes from
	 * a library, it can not be edited in the report design.
	 * 
	 * @return true if it can be edited. false if it can't.
	 */
	public boolean canEdit( )
	{
		boolean flag = getElement( ).canEdit( );
		if ( !flag )
			return false;
		return !getModule( ).isReadOnly( );
	}
	/**