Themes: fix a bug with theme registration
Themes: fix a bug with theme registration

liveblog/liveblog,darconny/liveblog,darconny/liveblog,superdesk/liveblog,darconny/liveblog,ancafarcas/liveblog,liveblog/liveblog,hlmnrmr/liveblog,superdesk/liveblog,darconny/liveblog,superdesk/liveblog,liveblog/liveblog,hlmnrmr/liveblog,hlmnrmr/liveblog,superdesk/liveblog,ancafarcas/liveblog,ancafarcas/liveblog,liveblog/liveblog,ancafarcas/liveblog,hlmnrmr/liveblog,liveblog/liveblog