Server-side pagination

Also, it's worth noting that while ItemFileReadStore implements client-side paging (i.e. it won't create controls for the data until you want to see them, see the pageSize attribute), it has no effect at all on server-side paging. That means that if you have 50,000 records and you only want to load 100 at a time, you have to implement a new store that passes like start and end parameters to the server. This can be done, and might benefit us here if we have really large record sets. We'll have to see.

See here for some ideas.