transform rotated ellipse coordinates too
transform rotated ellipse coordinates too

 * when we draw axis-aligned ellipses (and other shapes) we transform
   the coordinates with the sheet-native-transformation of the
   medium's sheet. We need to do the same thing with non-axis-aligned
   ellipses, so do so in %draw-rotated-ellipse.

slyrus/mcclim,slyrus/mcclim