Backport all non-master-specific changes from master (!64) · Merge requests · LHCb / Phys · GitLab

A few commits that went through the SVN mirroring: 1ee7a165, ad3b5b92, 6d4f657c
The list of included MRs is !12 (merged), !23 (merged), !24 (merged), !26 (merged), !34 (merged), !39 (merged), !41 (merged), !42 (merged), !46 (merged), !47 (merged), !49 (merged), !50 (merged), !53 (merged), !57 (merged), !58 (merged), !63 (merged), !65 (merged), !66 (merged), !67 (merged), !68 (merged), !69 (merged), !72 (merged), !73 (merged), !74 (merged).
See LHCBPS-1685