[FIX] product: name in formula

When the user selects a pricelist based on a formula, the name in the
formula is the same if "Public Price" or "Cost" is selected.

opw-670563

addons/product/pricelist_view.xml

@@ -66,7 +66,8 @@
 
                         <label string="New Price ="/>
                         <div>
-                            <span attrs="{'invisible':[('base', 'not in', ('list_price','standard_price'))]}">Public Price  -  </span>
+                            <span attrs="{'invisible':[('base', '!=', 'list_price')]}">Public Price  -  </span>
+                            <span attrs="{'invisible':[('base', '!=', 'standard_price')]}">Cost  -  </span>
                             <span attrs="{'invisible':[('base', '!=', 'pricelist')]}">Other Pricelist  -  </span>
                         </div>
                         <label for="price_discount"/>