Problem

Figure title (Figure.suptitle()) and labels (Figure.supxlabel() andFigure.supylabel()) have the same default font size and weight. Although one can modify these values when creating the title and/or labels, it would be easier if users were able to set different defaults.

Proposed solution

Create rcParams calledfigure.labelweight andfigure.labelsize, so thatFigure.supxlabel() andFigure.supylabel() would default to these new values, rather thanrcParams["figure.titleweight"] andrcParams["figure.titlesize"].