Improve Timing of Displaying Errors

[mfaust]

If a post fails to be sent, we retry it 3x times.
The Studio's Job implementation only awaits 1x execution, after that the result is errorneous or successul. So the problem is that even if the post isn't marked as "failed" yet, the job is finished, but the messages isn't displayed in the history until it is marked as "permanently failed".