Add mod-private info to network profile

[cellio]

Follow-on to #1409:

The "all communities" list is currently not sensitive to who's asking; it shows public information from the user's profiles across the network. We should add some information for moderators and admins, including the number of deleted posts (we show the undeleted post count now) and whether the user is suspended. After #767 there might be other things it makes sense to add, but this will do for now.

The check would be: when viewing this list of profiles, for each profile, if current_user is a mod/admin on the target community, show this info, else not. We do a similar sort of thing in the dashboard, where you see the number of pending edits only if you can review them there.

[cellio]

Do this after #1411, because we'll need a similar mechanism here.