* add description to upload_pipeline_description http endpoint
* add test for pipeline upload server description
* add description to new pipeline version
* show pipeline version in pipeline detail page
* make description optional on UI + show version descriptio or pipeline description
* remove unused reference
* revert wrong change of ref
* updated on should be pipeline version
* add more versions to mock-backend
* show pipeline and version description at the same time
* add tests for UI
* show pipeline version always