Topic on Extension:Collection/Wishlist

According to Book Help, I should be able to Collect articles if I "hover over a link for a few seconds". This does not work for me. I have "Navigation popups" enabled, though disabling it makes no difference. I'm accessing Wikipedia (Vector theme) with MediaWiki 1.24wmf7 (b8870ae) with Collection v. 1.7.0.

Perhaps Wikipedia articles that are part of a book, could have their links styled differently?

This now seems to be almost working, the pop-up appears, but is almost illegible (see image).

The green add icon is just visible, but that's about it. Could be just a CSS issue.