Product stock status issue in the wishlist sidebar

Reported in the [WordPress forum](https://wordpress.org/support/topic/stock-status-into-the-sidebar/) by @Leonidas.

- [x] In the wishlist sidebar modal, product stock status not getting displayed when product is added to wishlist. However product stock status is displayed in wishlist page.
