Nightly 2.97.143

The needle moves on every channel. The real fault was one line up from where I kept looking:
the gauge was reading the wheel, EV, zoom and focus from values collected at the top of the screen
but never read inside the meter's own block, and Compose only redraws the part of a screen that
actually reads a value. Filters worked by accident, because the filter is read elsewhere in the
outer body and drags the whole screen along with it. The meter reads its own inputs now, so EV,
zoom, focus, shutter and ISO all sweep the way filters always did.

The !n mark fades after ten seconds. A mark that stayed until it was read made sense while
faults were being hunted and reads as a bandage now that they're rare. It shows for ten seconds
after the most recent fault, then fades out of the picture. Nothing is lost: the tally stands and
a shake report still carries every name.