FIX: moderators should not be able to see site setting changes in the staff action logs. Fixes #2027

db/migrate/20140228205743_add_admin_only_to_user_histories.rb

@@ -0,0 +1,10 @@
+class AddAdminOnlyToUserHistories < ActiveRecord::Migration
+  def up
+    add_column :user_histories, :admin_only, :boolean, default: false
+    execute "UPDATE user_histories SET admin_only = true WHERE action = #{UserHistory.actions[:change_site_setting]}"
+  end
+
+  def down
+    remove_column :user_histories, :admin_only
+  end
+end