play.py: send ItemsChanged for everything
play.py: send ItemsChanged for everything

PropertiesChanged was still sent in response to a SetValue
call.  This is not incorrect behaviour, but a little different
to how it is now handled in velib. Therefore swap out all uses
of PropertiesChanged for ItemsChanged, when enabled (which is
the default).

victronenergy/dbus-recorder,victronenergy/dbus-recorder