A module whose setup() threw was reported as hidden with its panel already on
screen -- appended one line too early. The file states the opposite guarantee.
A redraw destroyed every control and then rebuilt, so a row revealed by another
value -- one the first build never rendered and so never checked -- stripped
the panel and threw on the way to refilling it. Building first makes a redraw
as safe as the first build already was.
A page loaded at a narrow width recorded the panel its own one-at-a-time rule
had just closed as one the user wanted closed, so widening brought back only
the left. What the user chose is now kept apart from what is on screen.
The redraw test counted rows and passed against the bug; a control removed from
a row leaves the row behind. It counts controls.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
