[FIX] estate: replace invalid models.Constraint with _sql_constraints

The models.Constraint syntax does not exist in Odoo's ORM.
SQL constraints must be defined using the _sql_constraints class attribute.

Author: raibr

estate/views/estate_property_offer_views.xml

@@ -5,16 +5,19 @@
         <field name="name">estate.property.offer.view.list</field>
         <field name="model">estate.property.offer</field>
         <field name="arch" type="xml">
-            <list editable="bottom" decoration-danger="status == 'refused'" decoration-success="status == 'accepted'">
-                <field name="price"/>
-                <field name="partner_id"/>
-                <field name="property_id"/>
-                <field name="validity"/>
-                <field name="date_deadline"/>
-                <field name="status" column_invisible="1"/>
-                <button name="action_accept" type="object" icon="fa-check" title="Accept"/>
-                <button name="action_refuse" type="object" icon="fa-times" title="Refuse"/>
-                
+            <list editable="bottom" decoration-danger="status == 'refused'"
+                decoration-success="status == 'accepted'">
+                <field name="price" />
+                <field name="partner_id" />
+                <field name="property_id" />
+                <field name="property_id" />
+                <field name="validity" />
+                <field name="date_deadline" />
+                <field name="status" />
+                <button name="action_accept" type="object" icon="fa-check" title="Accept" />
+                <button name="action_refuse" type="object" icon="fa-times" title="Refuse" />
+
+
             </list>
         </field>
     </record>
@@ -27,12 +30,12 @@
             <form>
                 <sheet>
                     <group>
-                        <field name="price"/>
-                        <field name="partner_id"/>
-                        <field name="property_id"/>
-                        <field name="validity"/>
-                        <field name="date_deadline"/>
-                        <field name="status"/>
+                        <field name="price" />
+                        <field name="partner_id" />
+                        <field name="property_id" />
+                        <field name="validity" />
+                        <field name="date_deadline" />
+                        <field name="status" />
                     </group>
                 </sheet>
             </form>
@@ -45,5 +48,6 @@
         <field name="res_model">estate.property.offer</field>
         <field name="view_mode">list,form</field>
         <field name="domain">[('property_id.property_type_id', '=', active_id)]</field>
+        <field name="domain">[('property_id.property_type_id', '=', active_id)]</field>
     </record>
-</odoo>
+</odoo>

estate/views/estate_property_views.xml

@@ -17,7 +17,7 @@
                 <field name="expected_price" />
                 <field name="selling_price" />
                 <field name="date_availability" optional="hide" />
-                <field name="state" invisible="1" />
+                <field name="state" />
             </list>
         </field>