[MIG] account_financial_report: Finalize migration to 12.0

* Move back to CSS and FIX

  NameError: variable @odoo-view-background-color is undefined in - on line 99, column 23:
  98 .o_account_financial_reports_page {
  99     background-color: @odoo-view-background-color;
  100     color: @odoo-main-text-color;

* Porting: parent_left does not exist anymore. Using parent_path + account code to sort report lines

* FIX js error with date object not converted to string while clicking on initial balance amount
  See https://user-images.githubusercontent.com/1033131/58337566-5d525c80-7e46-11e9-913a-3c3e0115fb3e.gif

* IMP style and metadata

* FIX tests about new date format and partner_id computed field of account.move

* FIX errors like

  2019-06-03 16:11:51,406 17857 ERROR dev_12_account_financial_report odoo.sql_db: bad query: b"\nDELETE FROM 'report_vat_report_tax'\nWHERE COALESCE(\n    write_date, create_date, (now() at time zone 'UTC'))::timestamp\n    < ((now() at time zone 'UTC') - interval '3600.0 seconds')\n"
  ERROR: syntax error at or near "'report_vat_report_tax'"
  LINE 2: DELETE FROM 'report_vat_report_tax'
                    ^
* IMP translation template and IMP Italian translation

* Remove useless comments
* Use AsIs to avoid SQL injection
* Use fields.Date methods
* Remove useless data from tests
* Improve comments
* Fix wizard.multi.charts.accounts
* Move _get_partner_ids_domain to abstract wizard
* Refactor default partners in wizard to use recordsets
* Improve js style

account_financial_report/report/trial_balance.py

@@ -74,8 +74,10 @@ class TrialBalanceReportAccount(models.TransientModel):
         index=True
     )
     hide_line = fields.Boolean(compute='_compute_hide_line')
-    # Data fields, used to keep link with real object
-    sequence = fields.Integer(index=True, default=1)
+    # Data fields, used to keep link with real object.
+    # Sequence is a Char later built with 'parent_path' for groups
+    # and parent_path + account code for accounts
+    sequence = fields.Char(index=True, default='1')
     level = fields.Integer(index=True, default=1)
 
     # Data fields, used to keep link with real object
@@ -209,7 +211,8 @@ class TrialBalanceReportCompute(models.TransientModel):
                           'report_trial_balance_qweb'
         return self.env['ir.actions.report'].search(
             [('report_name', '=', report_name),
-             ('report_type', '=', report_type)], limit=1).report_action(self, config=False)
+             ('report_type', '=', report_type)],
+            limit=1).report_action(self, config=False)
 
     def _get_html(self):
         result = {}
@@ -410,7 +413,7 @@ SELECT
     accgroup.parent_id,
     coalesce(accgroup.code_prefix, accgroup.name),
     accgroup.name,
-    accgroup.id * 100000,
+    accgroup.parent_path,
     accgroup.level
 FROM
     account_group accgroup"""
@@ -557,7 +560,7 @@ WHERE report_trial_balance_account.account_group_id = accgroup.id
         """Compute sequence, level for report_trial_balance_account account."""
         query_update_account_group = """
 UPDATE report_trial_balance_account
-SET sequence = newline.sequence + 1,
+SET sequence = CONCAT(newline.sequence, newline.code),
     level = newline.level + 1
 FROM report_trial_balance_account as newline
 WHERE newline.account_group_id = report_trial_balance_account.parent_id