Port EWvirt from rel-2-2-10 to master
This cherry-picks EWvirt commits from rel-2-2-10 to master.
Some of the commits (those related to #41 (closed)) existed on 41-me-scale-variations-in-the-presence-of-ewvirt. This branch can be deleted when this issue is resolved.
The associated MR is !355 (merged).
Edited by Enrico Bothmann