Set update interval of D-Bus properties from 500 to 2500ms
Set update interval of D-Bus properties from 500 to 2500ms

It appears that performance of the gui process depends on the number of
PropertyChanges comming from the D-Bus. dbus-cgwacs used to publish values
whenever retrieved (500ms interval).

victronenergy/dbus-cgwacs,victronenergy/dbus-cgwacs,victronenergy/dbus-cgwacs