Delay sending of notification until it's saved in database

Otherwise Celery doesn't know this notification and can't send it.

added part::backend prio::1 type::bug labels

added 3 commits

• 872cb071...257c3343 - 2 commits from branch master
• eafcb476 - Merge branch 'master' into fix/delay-notification

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added 2 commits

• a7297271 - 1 commit from branch master
• 64a5c1d7 - Merge branch 'master' into fix/delay-notification

Compare with previous version

merged

mentioned in commit 30e90012