function _setStateUpdateTimer(){
            if(htVar.nStateUpdateTimer != null){
                yobi.Interval.clear(htVar.nStateUpdateTimer);
                htVar.nStateUpdateTimer = null;
            }

            htVar.nStateUpdateTimer = yobi.Interval.set(function(){
                if(htVar.bStateUpdating !== true){
                    _updateState();
                }
            }, htVar.nStateUpdateInterval);
        }
update current state of pullRequest automatically
with interval timer