wire() registered every settings-page callback in one 416-line function,
fenced only by section comments. Each fenced section (opening and
closing, cache, faces, export, reset) is now its own private function
that wire() calls in the same order, with the section's own comment kept
as its doc comment. on_budget_changed and on_open are coerced to trait
objects at the top of wire() so the new functions take a plain
Rc<dyn Fn> rather than needing their own generic parameter, with no
change in the closures registered or the order they are registered in.
dtourolle
04949741c1