[FIX] hr_payroll: use calendar as default view

The webclient doesn't handle a non-existing view as the default
view. However, it must handle it correctly if it is not the
default one since it does it for mrp.production already.

addons/hr_payroll/views/hr_benefit_views.xml

@@ -5,7 +5,7 @@
         <field name="name">Benefit</field>
         <field name="res_model">hr.benefit</field>
         <field name="view_type">form</field>
-        <field name="view_mode">gantt,calendar,tree,form,pivot</field>
+        <field name="view_mode">calendar,gantt,tree,form,pivot</field>
     </record>
 
     <record id="hr_benefit_gantt" model="ir.ui.view">