[14.0][FIX] partner_multi_company: default value for res_partner.company_ids

[PicchiSeba]

When company_ids is not set that means the contact will be available to all companies. This might create some noise and unwanted behavior.

A user assigned to only one company that creates a new contact without changing the company_ids field is going to make the contact available for anyone.

We can set the field to the current company in order to prevent this. If the user really wants to make the contact available to everyone they have to manually change the field.

Moreover the current module behavior goes against what's written in the USAGE file

On the partner form view, go to the "Sales & Purchases" tab, and put the companies in which you want to use that partner. If none is selected, the partner will be visible in all of them. The default value is the current one.

[PicchiSeba]

Updated the docs with the new option

[PicchiSeba]

I also added a test to address these changes

[PicchiSeba]

Ok, we should be good by now.

Let me know if you see any issue

[francesco-ooops]

@pedrobaeza in the end we went for the setting, in order to minimize disruption. Let us know if it's good for merge, thanks!

[OCA-git-bot]

This PR has the approved label and has been created more than 5 days ago. It should therefore be ready to merge by a maintainer (or a PSC member if the concerned addon has no declared maintainer). 🤖

[francesco-ooops]

@pedrobaeza shall we merge?

[pedrobaeza]

/ocabot merge minor

[OCA-git-bot]

This PR looks fantastic, let's merge it! Prepared branch 14.0-ocabot-merge-pr-575-by-pedrobaeza-bump-minor, awaiting test results.

[OCA-git-bot]

Congratulations, your PR was merged at 732e0cf5f9de4d842fe246c44564156989d8ba57. Thanks a lot for contributing to OCA. ❤️