Bring back main programming language in repo
Description
We removed the main language feature on 8.9 due to a preformance issue, but it would be great if we could re visit this.
Proposal
Improve performance on main language feature and add it again.
Links / references
- https://gitlab.com/gitlab-org/gitlab-ce/commit/85495c8c85533e2d4156231fd2535270afffef5a/
- ZD: https://gitlab.zendesk.com/agent/tickets/45721
/cc @twk3
Edited by Chad Woolley