Wishlist/purchase tracker

[jumpinjackie]

Ability to:

• [x] Enter/update/delete card/qty
  • [x] Convert to SKUs in collection when purchased
• [x] Register storefronts for price comparison
• [x] Enter/update storefront qty/pricing for given card
• [x] Price compare against various storefronts
• [x] Generate optimised buying list based on storefront price comparison
• [x] Show total required spend on bottom right corner
• [x] BUG: If qty/edition is edited, that values are lost when item is moved to collection