[C1] Support multi-URL with language settings

[ywarnier]

For some reason, it is not possible to set a "PlatformLanguage" per access_url_id, even when the setting allows for changes per URL.

If I have a multi-URL install, whatever the URL I'm in, if I change the PlatformLanguage setting (the default language of the platform), it is changed as a single record in settings_current. Normally, if I change it from a sub-URL, it should create a new entry in settings_current with the sub-URL's access_url_id.

[christianbeeznest]

It is fixed with this PR #6033

Thanks for confirmation.

[NicoDucou]

I just tested it, and it works fine to set a different default language for sub URLs.
There is still a little problem, when on the page main/admin/languages.php on a sub URL there is no indication of the default language.
Normaly the in the property column there is a grey icon for all the language to be able to set it as the default language

except for the current default that has a blue icon with no action

Once this little modification is done you can fix the conflict that do not enable to merge the branch and do the merge with 1.11.x

[NicoDucou]

It is now fully fixed with the last commit that fixes the previous comment.