Only update main language if it is not already set
Related to gitlab-org/gitlab-ce#14937 (but does not fully fix) This is a temporary fix so performance isn't affected so much.
cc @yorickpeterse @ayufan how does this look?
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Related to gitlab-org/gitlab-ce#14937 (but does not fully fix) This is a temporary fix so performance isn't affected so much.
cc @yorickpeterse @ayufan how does this look?