bench-kit 1.9.7

• Book: the stage slider turns “every revision” off (David, via Melville): with every revision shown, the slider was disabled and ◀ ▶ changed the stage with nothing to show for it; only the run through the stages unticked the box. The slider now stays usable, drawn fainter while every revision is on, and moving it, ◀ or ▶ unticks the box and shows the text at the stage, with Strike deletions offered again. The box's tip says so.