saving matrix message in history also when sending fails

[burnout87]

Noticed with the two issues (the second following the first):

• https://cdci.sentry.io/issues/5169040549/?project=1467382&query=is%3Aunresolved&referrer=issue-stream&statsPeriod=30d&stream_index=8
• https://cdci.sentry.io/issues/4744859521/?project=1467382&query=is%3Aunresolved&referrer=issue-stream&statsPeriod=30d&stream_index=7

If the sending fails, message should not be saved within the history.

[burnout87]

https://cdci.sentry.io/issues/5169040549/?project=1467382&query=is%3Aunresolved&referrer=issue-stream&statsPeriod=30d&stream_index=8

regarding this one, a bug was found on the frontend https://github.com/oda-hub/mmoda-frontend-module/pull/261