Currently the editor is very basic when it comes to very large networks. Hopefully in the future in addition to web it adds more options and filters.
What I started doing was adding them to a group and then putting groups on maps. Groups Could be dynamic, like ip starts with 192.168.1. for location 1. Then all you put on your maps are groups and you just make sure all your node fall into groups based on dynamic queries.
No more editing of maps! yea!
(well except when you add a new location)