Restore functionality allowing selection of Allen sequence.

Restore functionality allowing selection of Allen sequence

Should go together with Allen!903 (merged) and Moore!1615 (merged).

added RTA label

mentioned in merge request Allen!903 (merged)

mentioned in merge request Moore!1615 (merged)

changed the description

mentioned in issue Allen#332 (closed)

• [2022-06-27 12:34] Validation started with lhcb-master-mr#4864

mentioned in issue Moore#448 (closed)

marked this merge request as ready

approved this merge request

merged

mentioned in commit ec42909f