The clock-icon popup in the workout editor was capped at max-h-80
(~320px = ~5 history rows). Users with multi-year history saw older
sessions hidden behind a tiny inner scrollbar. Bumped to 70vh so it
scales with the viewport — ~15+ rows on a normal display, more on a
large monitor.
The IntersectionObserver pagination already loaded more rows on
demand; the old cap just kept them off-screen.
Pure CSS-class change. No schema, no API, no data.