Link each feature page to its doc
Closes #1302 (closed) closes #1307 (closed)
Pages affected:
- features/issueboard
- features/cycle-analytics
- features/review-apps
- features/gitlab-ci-cd
- features/file-locking
- features/time-tracking
- features/gitlab-geo
I added a button on the top linking to the respective doc.
The only page not touched is features/premium-support/, as there's no doc for it.
How they look:
