Fix session ID not being passed

Author: daveearley

frontend/src/components/routes/product-widget/SelectProducts/index.tsx

@@ -283,7 +283,7 @@ const SelectProducts = (props: SelectProductsProps) => {
                             </h4>
                             <Trans>
                                 If a new tab did not open, please {' '}
-                                <a href={'/checkout/' + eventId + '/' + productMutation.data?.data.short_id + '/details'}
+                                <a href={'/checkout/' + eventId + '/' + productMutation.data?.data.short_id + '/details' + '?session_identifier=' + productMutation.data?.data.session_identifier}
                                    target={'_blank'} rel={'noopener noreferrer'}>
                                     <b>{t`click here`}</b>.
                                 </a>