Bug 148761 Unable to copy a report item from template to report
Steps: 1. Create a template, add a Text item "t1" or others 2. Create template item using "t1" 3. Double click the template item and we get a report item again. 4. We copy the item, paste to another report file. Expected: the text item can be copied. Actual result: Nothing happened, not copied and no error msg.
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