What
A loop that builds the paginated list of key hints (the short reminders of available keyboard shortcuts) was broken: it referenced variables that were never defined and used a broken counter that didn't advance correctly. It now correctly steps through the hint list two at a time and adds each pair to the display.
Why
This fixes the pagination logic behind a help screen's key-hint list, so the hints display correctly instead of failing due to the undefined references and broken counter.