Shared rubrics between questions

An early design decision was that rubrics are not shared between questions. But there may be cases when its convenient to share them. I remember adding the option to the "Scoping" part of the UI so I guess I was considering allowing them shared:

In the meantime: workarounds exist using scripting (plom-create rubric --help and similar using python3 manage.py ... I assume in nextgen) but that's a bit annoying if you want to update the text later...