(address . bug-guix@gnu.org)
mate-control-center 1.24 has some broken "submenus".
`Preferred Applications` do not start/work.
`Time and Date Manager` does not work as well. Resulting in following
dbus error:
```
GetNtpState
GBDus.Error:org.freedesktop.DBus.Error.ServiceUnkwon: The name
org.freedesktop.timedate1 was not provided by any .service files
```