restart method
void
restart()
Implementation
void restart() {
final now = DateTime.now();
_lastActivityTime = now;
_lastWorkTime = now;
_currentDateTime = now;
_currentCount = 0;
_newCurrentCount = 0;
_workCount = 0;
_newWorkCount = 0;
_privateCount = 0;
_newPrivateCount = 0;
_startTimer();
}