FIX: Don’t translate TrustLevel name when generating links (#13588)

We want to put the name of the trust level in to generated URLs, not the human-readable form.

i.e.:

`/admin/users/list/newuser`

rather than:

`/admin/users/list/new user`

app/models/concerns/reports/users_by_trust_level.rb

@@ -24,7 +24,7 @@ module Reports::UsersByTrustLevel
       ]
 
       User.real.group('trust_level').count.sort.each do |level, count|
-        key = TrustLevel.name(level.to_i)
+        key = TrustLevel.levels.key(level.to_i)
         url = Proc.new { |k| "/admin/users/list/#{k}" }
         report.data << { url: url.call(key), key: key, x: level.to_i, y: count }
       end