* When you select 'add' a new empty set of details are displayed to be edited.
* Again Apply will commit them.
*
- * TODO: @ref RIGHT_ADMIN and @ref RIGHT_USERINFO should be applied here, so we
- * can give decent error messages.
- *
* TODO: it would be really nice if the Username entry could be removed and new
* user names entered in the list, rather off in the details panel. This may
* be possible with a sufficiently clever GtkCellRenderer.