Bug 209106 BIRT - User properties defined in a library are not seen in properties view
In the attached library there is a grid container. The text control and the row of the table in the grid have two user properties each. We can see them in the library but not when we drag them in to a design. The property does not show up in the properties view
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/DesignElement.java
* @param list
	 *            the value list to check
	 * @param toAdd
	 *            the value item to add. This parameter maybe is
	 *            <code>null</code>.
	 * @throws PropertyValueException
	 *             if the structure list or the item to add has any semantic
	 *             error..
	 */
	public void checkSimpleList( Module module, PropertyDefn propDefn,
			List list, Object toAdd ) throws PropertyValueException
	{
		List errorList = SimpleListValidator.getInstance( ).validateForAdding(
				getHandle( module ), propDefn, list, toAdd );
		if ( errorList.size( ) > 0 )
		{
			throw (PropertyValueException) errorList.get( 0 );
		}
	}
	/**
	 * The common logic for both clone and cloneForTemplate.
	 * 
	 * @return the clone element with reference to parent in library
	 * @throws CloneNotSupportedException
	 */
	protected Object baseClone( ) throws CloneNotSupportedException
	{
		DesignElement element = (DesignElement) super.clone( );
		
		element.containerInfo = null;