Bug 149783 Display text for extend elelment in master page is not found
Steps to reproduce: 1.New a library, add a properties file for the library, add pair"k1=actuate" to the properties file 2.Add a label "aaa" in master page header, set "k1" as the text key 3.Publish the library 4.New a report, extend lib.masterpage 5.Open extended master page in report Expected result: label shows display text "actuate" Actual result: label shows text "aaa"
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/util/ModelUtil.java
return ( (Structure) value ).copy( );
			case PropertyType.ELEMENT_REF_TYPE :
			case PropertyType.STRUCT_REF_TYPE :
				ReferenceValue refValue = (ReferenceValue) value;
				return refValue.copy( );
			case PropertyType.LIST_TYPE :
				return ModelUtil.clonePropertyList( (List) value );
		}
		return value;
	}
	/**
	 * Copies a list of simple property values.
	 * 
	 * @param value
	 *            the original value to copy
	 * @return the cloned list of simple property values
	 */
	private static Object clonePropertyList( List value )
	{
		if ( value == null )
			return null;
		ArrayList returnList = new ArrayList( );
		for ( int i = 0; i < value.size( ); i++ )
		{
			Object item = value.get( i );
			if ( item instanceof ElementRefValue )
			{
				returnList.add( ( (ElementRefValue) item ).copy( ) );
			}
			else