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/ContentCommand.java
List derived = content.getDerived( );
			
			Iterator iter = derived.iterator( );
			while ( iter.hasNext( ) )
			{
				DesignElement child = (DesignElement) iter.next( );
				if ( focus.contains( module, child ) )
				{
					
					
					if ( focus.indexOf( module, child ) <= newPosn )
						return false;
				}
			}
			DesignElement e = content.getExtendsElement( );
			while ( e != null )
			{
				
				
				if ( focus.indexOf( module, e ) >= newPosn )
					return false;
				e = e.getExtendsElement( );
			}
		}
		return true;
	}
	/**
	 * Returns true if content in component slot of report design has
	 * descendants, otherwise false.
	 *