v1.8 - Rosa canina

- Quotes (Premium 𝕘Store module, 5 free to try), convertible into invoices
- Client/product pickers: search + recents + alphabetical sort
- Documents grouped by month, days until due date
- Currency ISO code on PDFs
- New fields: country, VAT-exempt, intra-EU sales, product type
- From an invoice, push edits back to the product/client card
- Design: polished
- More explicit PDF filenames
