5.8.9

• dw-demo-pim screen-authoring.md: one layout, one tab per product type. A tab whose editors the
  product lacks is not rendered, so one ProductEditScreen layout with a tab per category shows each
  product type its own tab. Unplaced editors go to the IsCatchAll group and vanish silently without one;
  group names must be unique across the layout. Saves renumber Order, ScreenLayoutDelete cascades,
  writes apply on the next load.
• dw-demo-pim screen-authoring.md: query list presets render headers but blank cells. Row data comes
  from the user's own default ProductListScreen preset, not the query's ListScreenViewPresetId; give each
  worklist user a default list preset covering every query column (platform defect, DW 10.29.6).
• Translation worklist that opens side by side. Query edit-screen languages plus Open product in edit
  mode open Multi Edit; the hidden ProductQueryListWidget is added by system name and has product-aware
  rows. Recipe in dw-demo-pim localization.md, widget row in dw-pim-completeness rules-and-dashboards.md.