Merge branch '38-orchestrator-mail-controller-format-of-mail-text-and-signature-are-not-utf8-usage-of-accents-is' into 'dev'

Resolve "[Orchestrator] - Mail controller - format of mail text and signature are not utf8 - usage of accents is impossible"

See merge request !47

3 jobs for 40-integrator-maillib-fallback-to-base-64-is-not-required

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