In system overview context, $app->blog should be blog or website selected by user but is undefined instead. This causes errors later in the code when blog methods such as $blog->commenter_authenticators are called on $blog instead of $obj (which is blog or website selected by user). bugid:111930
Display alternate name for websites and blogs on website/blog listing screen when website/blog name consists only of spaces. bugid:111930
Display alternate name for filters on filter listing screen when filter label consists only of spaces. bugid:111930