VE-1528: Infinite scroll for suggestions

https://wikia-inc.atlassian.net/browse/VE-1528
If the main problem with using it is the name of the event - "preview" - then maybe let's change that event? It is not named properly in the first place (I think it should be something more generic that gives developer ability to decide what should happen - instead of implying that it should be a preview action). If it's not the case (if it's way more work) I would be ok merging it and adding it to the TODO list you created recently (and probably re-estimating it slightly).