That would be helpful indeed! Just yesterday I was looking for the curfew planner thingie and blanked out what it might be called (family pinboard).
As a workaround have you tried putting your fav objects into a room and saving that room to your library? Then when you need an item from it you can purchase it from that room instead of browsing through the whole catalogue. I think that's supposed to be the successor to the Collections folders in Sims 2.