Detailed Description
This is the base class from which different authorization icon widget
which actually do something should be derived. You can use these
widgets to show that the user has (or doesn't have) the ability to do
something, and why that is.
One of the most useful things you can do with this is connect
authChanged(bool) to setEnabled(bool) for a widget to turn it on and
off depending on the status of whatever it is you are monitoring.
See also: KRootPermsIcon, KWritePermsIcon
Re-implement this method if you want the icon to update itself
when something external has changed (i.e. a file on disk, uid/gid).
this signal is emitted when authorization has changed from
it's previous state.