With Wayland we can't just share X11 windows/screens; we need to ask for
a stream from the compositor. Add support for that, falling back to the
direct mode if it isn't present (since *Pidgin* can be using X11 even
when the system is Wayland).
pidgin_status_box_add(PIDGIN_STATUS_BOX(status_box),PIDGIN_STATUS_BOX_TYPE_PRIMITIVE,NULL,_("Do not disturb"),NULL,GINT_TO_POINTER(PURPLE_STATUS_UNAVAILABLE));