Fix #407: Confirm email without requiring the user to validate the form manually

Status Job ID Name Coverage
  Review
manual #50872
docker allowed to fail manual
review_docs
manual #50871
docker allowed to fail manual
review_front
 
  Lint
passed #50873
black

00:01:11

passed #50874
flake8

00:00:47

 
  Test
passed #50875
docker
test_api

00:03:55

91.0%
passed #50876
docker
test_front

00:03:27