RPN83P: RPN calculator for TI-83+ TI-84+ inspired by HP-42S

[bxparks]

I am changing the appearance of the RPN83P menus so that a MenuFolder is displayed with a small line above the box, so that it looks like a file folder icon. This makes the menus look like the HP-48 series, instead of the HP-42S. Here's a screenshot:

   

If anyone has strong objections, this would be the time to raise them, before I spend multiple days updating the 400-500 screenshots of those menus in various documents. It is possible to make this configurable with MODE options (a "42S-style" or a "48-style"), but I'm not seeing any downsides to the 48-style menus, so I would prefer to avoid a MODE option for this.

Funny story: I had seen screenshots of the HP-48 series for 20+ years, and I never knew what those little lines meant. Until 1-2 months ago, when I realized that those are file folder icons.