Merge branch '76-update-t3o_slack' into 'develop'

Resolve "Update t3o_slack"

Closes #76

See merge request !47
2 jobs for 77-confirmation-mail-is-send-to-wrong-address in 15 minutes and 7 seconds
Status Job ID Name Coverage
  Build
passed #7744
build

00:01:27

 
  Layout
passed #7745
layout

00:13:40