[j.748] Plot statement bp.show_or_export() or plt.show() no longer implied by high-level plot fcts (#748) (Closes #748)

Merging branch 'j.748'  into 'main'.

See merge request !1999

Merging branch 'j.746'  into 'main'.

See merge request !1998

Merging branch 'from_r21.1'  into 'main'.

See merge request !1996

Merging branch 'j.jobplot5'  into 'main'.

See merge request !1995

Merging branch 'j.jobplot4'  into 'main'.

See merge request !1993

Merging branch 'j.jobplot3'  into 'main'.

See merge request !1992

Merging branch 'j.replay2'  into 'main'.

See merge request !1991