[IMP] hr_contract: Hide bank account when no partner is set on employee

As the bank account should be linked to the same partner than the
address_home_id, it makes no sense to display it if this field is not
set.

addons/hr_contract/views/hr_contract_views.xml

@@ -35,7 +35,7 @@
                         </group>
                     </xpath>
                     <xpath expr="//field[@name='bank_account_id']" position="replace">
-                        <field name="bank_account_id" context="{'display_partner':True}"/>
+                        <field name="bank_account_id" context="{'display_partner':True}" attrs="{'invisible' : [('address_home_id', '=', False)]}"/>
                     </xpath>
                 </data>
             </field>