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/ContentRecord.java
* @param isAdd
	 *            whether to add or remove the item
	 */
	private void init( ContainerContext theContainerInfo,
			DesignElement contentObj, int newPos, boolean isAdd )
	{
		this.containerInfo = theContainerInfo;
		content = contentObj;
		add = isAdd;
		
		assert newPos >= -1;
		assert containerInfo != null;
		assert content != null;
		assert isAdd && content.getContainer( ) == null || !isAdd
				&& content.getContainer( ) != null;
		assert containerInfo.getContainerDefn( ).canContain( content );
		if ( isAdd )
		{
			int count = containerInfo.getContentCount( module );
			oldPosn = ( newPos == -1 || count < newPos ) ? count : newPos;
		}
		else
		{
			oldPosn = containerInfo.indexOf( module, content );
			assert oldPosn != -1;
		}
		if ( add )
			label = ModelMessages
					.getMessage( MessageConstants.ADD_ELEMENT_MESSAGE );
		else