[IMP] mail, membership: add activity view on main partner actions

Purpose is to extend the use of the newly-introduced activity view allowing
to see at a glance activities to perform on a given model. It eases daily
job of people working with activities.

Updated

  * main partner menu action (Customers);
  * membership partner main menu action;
  * customers / vendors main menu action used in various other apps;

This commit is linked to task ID 1889413.

addons/mail/views/res_partner_views.xml

@@ -61,6 +61,17 @@
             <field name="partner_to">${object.id}</field>
         </record>
 
+        <!-- Add mail-defined activity view to standard action on partners to manage activities related to partner model -->
+        <record id="base.action_partner_form" model="ir.actions.act_window">
+            <field name="view_mode">kanban,tree,form,activity</field>
+        </record>
+        <record id="base.action_partner_customer_form" model="ir.actions.act_window">
+            <field name="view_mode">kanban,tree,form,activity</field>
+        </record>
+        <record id="base.action_partner_supplier_form" model="ir.actions.act_window">
+            <field name="view_mode">kanban,tree,form,activity</field>
+        </record>
+
         <!--  Replace the default mass-mailing wizard in base with the composition wizard -->
         <act_window name="Send Email"
                 res_model="mail.compose.message"

addons/membership/views/partner_views.xml

@@ -48,6 +48,7 @@
         <record model="ir.actions.act_window" id="action_membership_members">
             <field name="name">Members</field>
             <field name="res_model">res.partner</field>
+            <field name="view_mode">kanban,tree,form,activity</field>
             <field name="search_view_id" ref="view_res_partner_member_filter"/>
             <field name="context">{"search_default_all_members": 1, "default_free_member": True}</field>
             <field name="help" type="html">