Merge branch '63-add-constants-for-several-plugins-into-t3org_layout' into 'develop'

Resolve "Add constants for several plugins into t3org_layout"

Closes #63

See merge request !55
3 jobs for develop in 3 minutes and 56 seconds (queued for 5 seconds)
Status Name Job ID Coverage
  Build
passed build #2247

00:01:31

 
  Layout
passed layout #2248

00:01:34

 
  Deploy
passed deploy-develop #2249
manual

00:00:49