Addressbooks settings rewrite and cleanup.

apps/contacts/ajax/activation.php

apps/contacts/ajax/addressbook/add.php

apps/contacts/ajax/addressbook/delete.php

apps/contacts/ajax/addressbook/update.php

apps/contacts/ajax/chooseaddressbook.php

apps/contacts/ajax/createaddressbook.php

apps/contacts/ajax/editaddressbook.php

apps/contacts/css/contacts.css

apps/contacts/js/contacts.js

apps/contacts/lib/app.php

apps/contacts/templates/index.php

apps/contacts/templates/part.chooseaddressbook.php

apps/contacts/templates/part.chooseaddressbook.rowfields.php

apps/contacts/templates/part.contact.php

apps/contacts/templates/part.edit_address_dialog.php

apps/contacts/templates/part.no_contacts.php

apps/contacts/templates/settings.php