NanoscopePropertyWatcher::watch logic assumes that refresh_state is idempotent with respect to the system property value. This change fixes a bug where this was not the case. We now make sure start_tracing is only called once for multiple refresh_state calls.
NanoscopePropertyWatcher::watchlogic assumes thatrefresh_stateis idempotent with respect to the system property value. This change fixes a bug where this was not the case. We now make surestart_tracingis only called once for multiplerefresh_statecalls.