[Selection Info Panel] Show total number of selected shapes and on/off-curve points

[mrk-z]

It would be very helpful to be able to see the total number of selected shapes, as well as the number of selected on/off-curve points. These would be especially useful for checking compatibility issues.

"Total selected shapes" should work for both contour shapes and components, including situations where there is a mix of contours and components. (Currently for components, we can see each component listed in the panel with numbered indices. But it would be helpful to be able to see a total number count without needing to scroll down to the bottom to look for the indice of the last component.)

"Total number of on/off-curve points" should display on/off-curve points separately.