I wasn't able to find anything similar to this using the search page, so I'll say it here.
Maybe add the AZ (alphabetical sorting) function to the userlist page in the editor, that will sort by levels (bit before the ':'), i.e.:
levelA:nick
levelZ:nick
levelC:nick
levelB:nick
levelA:nick
level2:nick
Press the magic "AZ" button, and it becomes:
level2:nick
levelA:nick
levelA:nick
levelB:nick
levelC:nick
levelZ:nick
It's mainly a convenience feature, but would save time if you're wanting to group the users in the list (seeing as at the moment you have to move them all by hand.)