[IMP] fleet: add activity view on main 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 :

  * fleet vehicle and contract main menu actions;

Some menu entries are also renamed to ensure coherence in all menu entries
that all use vehicles, with an 's'.

This commit is linked to task ID 1889413.

addons/fleet/views/fleet_vehicle_cost_views.xml

@@ -147,7 +147,7 @@
         </record>
 
         <record id='fleet_vehicle_costs_action' model='ir.actions.act_window'>
-            <field name="name">Vehicle Costs</field>
+            <field name="name">Vehicles Costs</field>
             <field name="res_model">fleet.vehicle.cost</field>
             <field name="view_type">form</field>
             <field name="view_mode">tree,kanban,form,graph</field>
@@ -361,7 +361,7 @@
         <field name="name">Vehicles Contracts</field>
         <field name="res_model">fleet.vehicle.log.contract</field>
         <field name="view_type">form</field>
-        <field name="view_mode">tree,kanban,form,graph</field>
+        <field name="view_mode">tree,kanban,form,graph,activity</field>
         <field name="context">{'search_default_open': 1}</field>
         <field name="help" type="html">
           <p class="o_view_nocontent_smiling_face">

addons/fleet/views/fleet_vehicle_model_views.xml

@@ -67,7 +67,7 @@
     </record>
 
     <record id='fleet_vehicle_model_action' model='ir.actions.act_window'>
-        <field name="name">Vehicle Model</field>
+        <field name="name">Vehicles Model</field>
         <field name="res_model">fleet.vehicle.model</field>
         <field name="view_type">form</field>
         <field name="view_mode">tree,form</field>

addons/fleet/views/fleet_vehicle_views.xml

@@ -245,7 +245,7 @@
         <field name="name">Vehicles</field>
         <field name="res_model">fleet.vehicle</field>
         <field name="view_type">form</field>
-        <field name="view_mode">kanban,tree,form</field>
+        <field name="view_mode">kanban,tree,form,activity</field>
         <field name="context">{'search_default_groupby_status': 1}</field>
         <field name="help" type="html">
           <p class="o_view_nocontent_smiling_face">