v2.4.3

Fix onboarding copy to match current app

Pages now read:

1. Welcome — general intro, no 'prices' mention
2. Credit Book (was Collections Dashboard) — describes search, group toggle, overdue colors
3. Recording Credits — describes top-insert, autocomplete, separate receipts
4. Payments & Undo (was Settings & Backup) — describes numpad, partial payments, undo on both credit and payment