Rekordbox collection search

As an old serato user I'm missing a big function. To do a search in a specified playlist folder in my rekordbox collection, not just in the playlists underneath one by one. When I highlight a folder, I want all tracks lying in the playlists in that folder to show in the browser so I can search this specified folder in one search. This is how I've been working for years in serato, please make this improvement Pioneer. I'm playing with pro DJ link atm and this really slows my work