we're not relying on overriding url::site() to do tricks around item
urls. This means that you won't get item urls by doing
url::site("albums/37"), for example, but it also means that we won't
get pretty urls where we don't expect them (like in the action of a
<form> element).
Incidentally, this will help us move over to using the slug format
because if you've got a bad character in a url, the edit forms will
now work on it since they'll be id based.
present the done box if you're done and let you get rid of it if you
want. It's not beautiful, by any means, but it gives you an easy link
back to your Gallery when you're finished.
Fixes ticket #479.
