To help reduce the pain of browsing large Realm files (https://github.com/realm/realm-studio/issues/419) a users needs a way to open Realms in a query-based mode where only a subset of data is initially synchronized and data is synchronized on demand, when the user is browsing the Realm.

The behaviour should essentially be the same as now - perhaps with some spinner indicating that the data associated with the query is being updated.

From a technical standpoint the prerequisites are:

1. the RealmFile has realmType === 'reference' and
2. we need to be able to create a query with a filtering and stable sorting and adjust the limits (from element 0 to x where x is increased as the user scrolls through the objects)
3. we need to be able to tell when the collection of objects associated with a query can be considered up-to-date (as we want to show the user if we are synchronizing or they can trust the view of the data as-is).