Merge pull request #414 from 4teamwork/lg-remove-public-trial-from-repository-byline

Remove `public_trial` field from repository byline.
Merge pull request #424 from 4teamwork/lg-remove-public-trial-from-dossier-and-repo-default-views

Remove public trial fields from dossier and repository default views
Hide duplicate mail title in mail preview tab with CSS.