Bug1363817: Show progress in title during bulkimport.php.

admin/users/bulkimport.php works one file at a time, with a page
reload for each user imported. It could probably do with a rewrite
to be more like bulkdownload. For now, though, give the user an
idea of the status via the page title.

Change-Id: I8f41e1889d9071930d049e4f51769fa1e760963b
Signed-off-by: Nigel Cunningham <nigelc@catalyst-au.net>
Merge "Bug1363817: Show progress in title during bulkimport.php."