use the new url to get directly to the schleuder list

app/controllers/application_controller.rb

@@ -125,9 +125,9 @@ class ApplicationController < ActionController::Base
     localpart = name.split("@", 2)[0]
     # TODO: move to api
     {
-      mailman: "https://lists.immerda.ch/mailman/admin/:localpart",
-      schleuder: "https://schleuder.immerda.ch"
-    }[which.to_sym].gsub(":name", name).gsub(":localpart", localpart)
+      mailman: "https://lists.immerda.ch/mailman/admin/%{localpart}",
+      schleuder: "https://schleuder.immerda.ch/lists/%{name}"
+    }[which.to_sym] % {name: name, localpart: localpart}
   end
   helper_method :canonical_resources_edit_link