[FIX] base: res.partner.bank sequence

`res.partner.bank` is ordered by sequence, but:
- there is no default value
- there is no widget handle to set it

Therefore, methods such as `_get_partner_bank_id` might retrieve an
unexpected value.

To avoid this:
- we fallback to sort by ID
- we add a default value
- we add the widget handle

opw-1948964

closes odoo/odoo#32300

Signed-off-by: Nicolas Martinelli (nim) <nim@odoo.com>

odoo/addons/base/res/res_bank.py

@@ -57,7 +57,7 @@ class ResPartnerBank(models.Model):
     _name = 'res.partner.bank'
     _rec_name = 'acc_number'
     _description = 'Bank Accounts'
-    _order = 'sequence'
+    _order = 'sequence, id'
 
     acc_type = fields.Char(compute='_compute_acc_type', help='Bank account type, inferred from account number')
     acc_number = fields.Char('Account Number', required=True)
@@ -66,7 +66,7 @@ class ResPartnerBank(models.Model):
     bank_id = fields.Many2one('res.bank', string='Bank')
     bank_name = fields.Char(related='bank_id.name')
     bank_bic = fields.Char(related='bank_id.bic')
-    sequence = fields.Integer()
+    sequence = fields.Integer(default=10)
     currency_id = fields.Many2one('res.currency', string='Currency')
     company_id = fields.Many2one('res.company', 'Company', default=lambda self: self.env.user.company_id, ondelete='cascade')
 

odoo/addons/base/res/res_bank_view.xml

@@ -63,6 +63,7 @@
             <field name="arch" type="xml">
                 <form string="Bank account">
                     <group col="4">
+                        <field name="sequence" invisible="1"/>
                         <field name="acc_number"/>
                         <field name="bank_id"/>
                         <field name="currency_id" groups="base.group_multi_currency" options="{'no_create': True}"/>
@@ -77,7 +78,7 @@
             <field name="model">res.partner.bank</field>
             <field name="arch" type="xml">
                 <tree string="Bank Accounts">
-                    <field name="sequence" invisible="1"/>
+                    <field name="sequence" widget="handle"/>
                     <field name="acc_number"/>
                     <field name="bank_name"/>
                     <field name="company_id" groups="base.group_multi_company"/>