wall.bless-panels drew nothing. It now draws the ladder's 5 x 8 ft size
(60x96: three 60 x 36 in sheets, 6 in joins) through panelSheets'
planPanels and screenLayout, the same plan the Bless print uses: the
sheets pulled apart, each join a red glue band with a dashed edge, a
banner on the first sheet, a footer on the last, and rows of portrait
cards inside each sheet's content box, never crossing a join.
The cards are a layout (src/panelsSvg.js): the Bless wall draws its real
cards in its own plugin, which the gallery cannot import. The card is not
offered for printing here.