Fix the highlight of current document in the search queue

We need to fix the highlight on the queue which would mean propagating the index and not just the document as otherwise the queue has no way to know where the document is.

This impacts not only when switching between views but also the highlight on the queue as the item might not have been loaded yet.

Note: this is only broken in the context of the new "lazy loading" listings (it's working on currently "infinite scrolling" listings).