Use item created date if edited doesn't exist in Protocol\Diaspora::buildStatus
Use item created date if edited doesn't exist in Protocol\Diaspora::buildStatus

- Addresses https://github.com/friendica/friendica/issues/6918#issuecomment-502347886

annando/friendica,annando/friendica,tobiasd/friendica,fabrixxm/friendica,friendica/friendica,tobiasd/friendica,fabrixxm/friendica,friendica/friendica,annando/friendica,fabrixxm/friendica,tobiasd/friendica,tobiasd/friendica,annando/friendica,friendica/friendica,tobiasd/friendica,friendica/friendica,fabrixxm/friendica,annando/friendica,friendica/friendica,fabrixxm/friendica