Release v4.43.0

The deals pipeline of the CRM blueprint needs each board column to say what it is worth.

Added

• kanbanBoard can total a numeric card field in each column header: name the field in totalField (a deal's amount) and format (currency with a currency code, percent, compact or a plain number); the totals are formatted in the element's locale and follow a card as it is moved, by dragging or by its Move-to menu.
• Docs: blueprints/foundation-components.md (Boards).

Part of #110