The Figure.group is a figure group, not a plot group

[henrikt-ma]

Small cleanup, loosely related to #3475 and #3473.

[maltelenz]

Seems like a clearly correct fix to me.

[HansOlsson]

Looks ok, but one might also rephrase it as "Name of the group of figures"; but I guess that will involve more updates

[henrikt-ma]

Looks ok, but one might also rephrase it as "Name of the group of figures"; but I guess that will involve more updates

To me, changing to Name of the group of figures is only a more verbose way of saying the same thing as today, and would suggest that we use the more verbose way of writing descriptions everywhere. To me that seems mostly like a waste of space (not least in view of the line length restrictions in the PDF), so I prefer the style of short description strings combined with clear explanations in the text.