Bug 136241 [regression]Preview template in web viewer and pdf didn't get correct effect.
Description: Preview template items in web viewer and pdf didn't get correct effect. Steps to reproduce: 1. Create template items. 2. Preview in Web Viewer and pdf. Expected result: Same effect as in html. Actual result: In web viewer, see only blank box. In pdf, blank page.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/command/ContentCommand.java
* @throws ContentException
	 *             if the content cannot be moved to new container.
	 */
	private void doMove( DesignElement content, int fromSlotID,
			DesignElement to, int toSlotID, int newPos )
			throws ContentException
	{
		assert content != null;
		assert to != null;
		assert newPos >= -1;
		
		if ( element == to && fromSlotID == toSlotID )
			return;
		
		
		if ( content.isVirtualElement( ) || content.getExtendsName( ) != null )
			throw new ContentException(
					element,
					fromSlotID,
					content,
					ContentException.DESIGN_EXCEPTION_STRUCTURE_CHANGE_FORBIDDEN );
		
		if ( to.isContentOf( content ) )
			throw new ContentException( to, fromSlotID, content,
					ContentException.DESIGN_EXCEPTION_RECURSIVE );
		
		if ( !element.getDefn( ).isContainer( ) )
			throw new ContentException( element, fromSlotID,
					ContentException.DESIGN_EXCEPTION_NOT_CONTAINER );
		if ( !to.getDefn( ).isContainer( ) )