Merge branch '339-clean-up-editing-extension' into 'develop'

Resolve "Clean up editing extension"

Closes #339

See merge request t3o/ter!328
4 jobs for develop in 7 minutes and 32 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed #6948
test

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  Build
passed #6949
build

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  Layout
passed #6950
layout

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  Deploy
passed #6951
deploy-develop

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