[IMP] account_accountant: css backport

To have a consistent css across all version of the new bank rec widget, we
decided to backport few changes.

backport of:
https://github.com/odoo/enterprise/commit/524a7a46a0c2888b591de7ad1a0a6d744e345f5a
https://github.com/odoo/enterprise/commit/2a83c85cb2c9a7a5da3d4a8483120eeda6b2e6cb
https://github.com/odoo/enterprise/commit/e3cb3ab3ec8c64297d8e97d941e0d2eea3e64667
https://github.com/odoo/enterprise/commit/fdbb93abbf831cfa2fdc75e79aa76c094d6e522a
https://github.com/odoo/enterprise/commit/f9725d7b01cbd1235f022821a6861adb2955e49e

[FIX] account_accountant: restrict some account in the set_account

Before this commit, we could select the liquidity account or bank suspense
account which could create a reco model for it that would do nothing.

[FIX] account_accountant: partner_name

Before this commit, when a transaction had no partner_name and some lines with
the same partner. When unfolded, we had the info of the partner on the statement
line and on the line itself which was a duplicate of information.

This commit will change when the line is unfolded so that the partner is visible
on the statement line only when there is a partner_name

[FIX] account_accountant: payable and receivable button

Before this commit, the payable and receivable buttons where on the top line
only when the reconcile button was not there anymore. Now We decided to always
have them present in secondary next to the reconcile button.

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Forward-Port-Of: odoo/enterprise#96852