Bug 188829 Move the item ,the trans of the model don't close.
1:New report design. 2:Add a Embedded image. 3:Add another imge , then drag the second imge to the first position. 4:Change the size of the first image. Expected: Image change the size. Now: Image size don't change.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/command/AbstractContentCommand.java
record = new ContentRecord( module, toContainerInfor, content, newPos );
		stack.execute( record );
		record.setEventTarget( eventTarget );
	}
	/**
	 * Validates the context before moving an element.
	 * 
	 * @param content
	 *            the element to move
	 * @param toContainerInfor
	 *            the destination
	 * @throws ContentException
	 *             if <code>content</code> cannot resides in
	 *             <code>toContainerInfor</code>
	 */
	protected void checkBeforeMove( DesignElement content,
			ContainerContext toContainerInfor ) throws ContentException
	{
		assert content != null;
		assert toContainerInfor != null;
		
		if ( toContainerInfor.getElement( ).isContentOf( content ) )
			throw ContentExceptionFactory.createContentException(
					toContainerInfor, content,
					ContentException.DESIGN_EXCEPTION_RECURSIVE );
		
		if ( !element.getDefn( ).isContainer( ) )
			throw ContentExceptionFactory.createContentException( focus,
					ContentException.DESIGN_EXCEPTION_NOT_CONTAINER );
		if ( !toContainerInfor.getElement( ).getDefn( ).isContainer( ) )