Before this commit, the down payments line of the project profitability panel had no drill down action for salespersons and billing users without accounting access, because the group references were written with a trailing comma inside the XML id, making the two checks silently fail for everyone. Only the accounting read group check, written correctly, was effective.

Steps to reproduce:
- create a service product with "Create on Order: Project & Task", sell it on a sale order and confirm it
- create a down payment invoice from the sale order and post it
- create a user with Sales "User: All Documents" access, Project "User" access and no accounting access
- as that user, open the dashboard of the generated project and look at the Down Payments line of the profitability panel

The Down Payments amount is displayed as plain text, while a user with accounting access can click it to open the related invoices, as intended for the salesperson too.

Solution:
Move the commas out of the group references.

---
I confirm I have signed the CLA and read the PR guidelines at www.odoo.com/submit-pr

Forward-Port-Of: odoo/odoo#278521

In this commit 004b56a5c31841bc0bf4a9f17902bbff8d0f509d we added the `l10n_fr_pdp.what_is_pdp` action as PDP version of the `account_peppol.what_is_peppol` action.

But one case does not work / was not tested properly: We are registered on PDP already.
In that case we just want to go back to the "move send" wizard. But the `what_is_pdp` action does not support that currently. So there is a traceback.

Steps to reproduce:
1. Install `l10n_fr_pdp`
2. Activate French E-Invoicing / PDP in Demo mode
3. Create and post an invoice for a French PDP partner (e.g. just use the "FR Company")
4. Click "Send"
5. In the "move send" wizard disable the "French E-Invoicing (Demo)" option
6. Click on "Why should you use it?" in the warning
7. Click "Got it" in the window that pops up.
8. Traceback (see below)

```
Traceback (most recent call last):
  File "/home/odoo/src/odoo/odoo/http.py", line 2167, in _transactioning
    return service_model.retrying(func, env=self.env)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/odoo/src/odoo/odoo/service/model.py", line 157, in retrying
    result = func()
             ^^^^^^
  File "/home/odoo/src/odoo/odoo/http.py", line 2134, in _serve_ir_http
    response = self.dispatcher.dispatch(rule.endpoint, args)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/odoo/src/odoo/odoo/http.py", line 2382, in dispatch
    result = self.request.registry['ir.http']._dispatch(endpoint)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/odoo/src/odoo/odoo/addons/base/models/ir_http.py", line 333, in _dispatch
    result = endpoint(**request.params)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/odoo/src/odoo/odoo/http.py", line 754, in route_wrapper
    result = endpoint(self, *args, **params_ok)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/odoo/src/odoo/addons/web/controllers/dataset.py", line 36, in call_kw
    return call_kw(request.env[model], method, args, kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/odoo/src/odoo/odoo/api.py", line 535, in call_kw
    result = getattr(recs, name)(*args, **kwargs)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/odoo/src/odoo/addons/account_peppol/models/res_config_settings.py", line 159, in button_peppol_reregister
    self.ensure_one()
  File "/home/odoo/src/odoo/odoo/models.py", line 6277, in ensure_one
    raise ValueError("Expected singleton: %s" % self)
ValueError: Expected singleton: res.config.settings()
```

task-None


Thanks to KYMAG for finding / reporting the issue.

Forward-Port-Of: odoo/odoo#282406