[FIX] account_financial_report: multicompany+layout behaviour (#498)

* Fix wizards for proper multicompany behaviour.
* Fix layout issue

account_financial_report/wizard/open_items_wizard.py

@@ -17,7 +17,7 @@ class OpenItemsReportWizard(models.TransientModel):
     company_id = fields.Many2one(
         comodel_name='res.company',
         default=lambda self: self.env.user.company_id,
-        required=True,
+        required=False,
         string='Company'
     )
     date_at = fields.Date(required=True,
@@ -60,8 +60,22 @@ class OpenItemsReportWizard(models.TransientModel):
                 lambda p: p.company_id == self.company_id or
                 not p.company_id)
         if self.company_id and self.account_ids:
-            self.account_ids = self.account_ids.filtered(
-                lambda a: a.company_id == self.company_id)
+            if self.receivable_accounts_only or self.payable_accounts_only:
+                self.onchange_type_accounts_only()
+            else:
+                self.account_ids = self.account_ids.filtered(
+                    lambda a: a.company_id == self.company_id)
+        res = {'domain': {'account_ids': [],
+                          'partner_ids': []}}
+        if not self.company_id:
+            return res
+        else:
+            res['domain']['account_ids'] += [
+                ('company_id', '=', self.company_id.id)]
+            res['domain']['partner_ids'] += [
+                '|', ('company_id', '=', self.company_id.id),
+                ('company_id', '=', False)]
+        return res
 
     @api.onchange('receivable_accounts_only', 'payable_accounts_only')
     def onchange_type_accounts_only(self):