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
(ElementPropertyDefn) propDefn );
				if ( value != null )
				{
					if ( ( value instanceof StructRefValue )
							|| ( (ElementRefValue) value ).isResolved( ) )
					{
						try
						{
							
							
							PropertyCommand cmd = new PropertyCommand( module,
									element );
							cmd.setProperty( propDefn.getName( ), null );
						}
						catch ( SemanticException e )
						{
							assert false;
						}
					}
				}
			}
			else if ( propDefn.getTypeCode( ) == IPropertyType.LIST_TYPE
					&& propDefn.getSubTypeCode( ) == IPropertyType.ELEMENT_REF_TYPE )
			{
				List valueList = (List) element.getLocalProperty( module,
						(ElementPropertyDefn) propDefn );
				if ( valueList != null )
				{
					CachedMemberRef tmpMemberRef = new CachedMemberRef(
							(ElementPropertyDefn) propDefn );