Replace readonly groups by ir.model.button

issue5068
review29351002

production.py

@@ -209,8 +209,6 @@ class Production(Workflow, ModelSQL, ModelView):
                     },
                 'assign_wizard': {
                     'invisible': Eval('state') != 'waiting',
-                    'readonly': ~Eval('groups', []).contains(
-                        Id('stock', 'group_stock')),
                     },
                 'assign_try': {},
                 'assign_force': {},

production.xml

@@ -282,6 +282,16 @@ this repository contains the full copyright notices and license terms. -->
             <field name="group" ref="stock.group_stock_force_assignment"/>
         </record>
 
+        <record model="ir.model.button" id="production_assign_wizard_button">
+            <field name="name">assign_wizard</field>
+            <field name="model" search="[('model', '=', 'production')]"/>
+        </record>
+        <record model="ir.model.button-res.group"
+                id="production_assign_wizard_button_group_stock">
+            <field name="button" ref="production_assign_wizard_button"/>
+            <field name="group" ref="stock.group_stock"/>
+        </record>
+
         <record model="ir.ui.view" id="assign_failed_view_form">
             <field name="model">production.assign.failed</field>
             <field name="type">form</field>