fixes possibility of a user password change being sent out when a password couldn't be/wasn't changed

fixed pagetools being inaccessible on screens lacking necessary height, and aligned them to content when on smaller screens

previously it never returned any users

using http://cleancss.com/

This integrates the functionality of the now outdated addomain plugin
directly into the authad plugin and makes multi-domain setups usable
without SSO.

See also https://github.com/cosmocode/dokuwiki-plugin-addomain

Yes, it's hiding $auth, but detail templates might depend on that. We
need to fix this properly.

This reverts commit 343aa174.