refs #17712 [master] speed up deleting of single favorite and list items

* dont reload favorites because we use ajax in templates for single items
** early return when layout is lightbox
** for multiple items we still use bulk action in CartController
* dont set flash messages when deleting items
** override method performDeleteFavorite from vufind
** prevent delayed success messages when loading modals
** use VuFind.lightbox.alert with javascript in template instead (see 17711)