Idea: Show in admin edit product page an info block

[FredericMartinez]

Problem: Merchants can't know why a product isn't saleable.
It could be:

• Enabled yes/no
• is_in_stock yes/no
• use_stock yes + qty > backorders
• visibility KO
• 0 website assigned
• can_show_price (yes/no)
• is_purchasable (yes/no)
• for each custom groups:
  • can show price
  • is salable

A small info block could be the trick to help Merchant

✅ Product is saleable. [View this product](http://localhost/link-to-this-product-or-his-parent.html)

Or

❌ Product is not saleable:

- ✅ Enabled
- ✅ is_in_stock
- ✅ use_stock yes + qty > backorders
- ✅ visibility
- ❌ 0 website assigned. You have multiple websites, but this product has no website assigned.