[FIX] product: product_variant group does not exist anymore

Therefore, the pricelist item view must show the field product_tmpl_id in any case

addons/product/pricelist_view.xml

@@ -74,7 +74,7 @@
                     <field name="sequence"/>
                     <field colspan="4" name="name"/>
                     <field name="product_id"/>
-                    <field name="product_tmpl_id" groups="product.group_product_variant"/>
+                    <field name="product_tmpl_id"/>
                     <field name="categ_id"/>
                     <field name="min_quantity"/>
                     <field name="base"/>
@@ -92,7 +92,7 @@
 
                     <group col="4">
                         <field name="product_id" on_change="product_id_change(product_id)"/>
-                        <field name="product_tmpl_id" groups="product.group_product_variant"/>
+                        <field name="product_tmpl_id"/>
                         <field name="categ_id"/>
                         <field name="company_id" groups="base.group_multi_company" widget="selection"/>
                         <field name="min_quantity"/>