LPS-37375 Update toggler activeDescendant if the toggler is silently updated

Hey Iliyan,

We missed the case when the search filters the item nodes hiding them and silently expanding/collapsing the headers.

I'm not sure if this is the best way to address it, but at least keeps us from strongly coupling the search and the toggler_interaction... 

Let me know if you think we could approach it in a different way