Added sections to collections in Places. I find them handy for organizing places in a collection by days when planning a trip, but they can be used for anything — like grouping places by category (e.g. food spots, entertainment, sights, etc.). Places can be moved into a section using drag and drop and reordered the same way. Still need to implement optimistic UI to avoid the visual jump that occurs when an item is dropped and the update is handled over the network.