[C2] organisationemail and other extra fields duplicated or badly titled

[ywarnier]

For some reason, ExtraFieldFixtures.php contains the organisationemail twice for user fields: once as organisationemail directly, and another one as AzureAuthenticatorHelper::EXTRA_FIELD_ORGANISATION_EMAIL.

The second one is clearly needed for Azure authentication. The first one... not clear, so I would remove the first one, but this would require changing ExtraFieldFixtures.php and adding a migration to remove the duplicate.

This is also the case for azure_id (remove the first one).

Also, the display_text for:

• LinkedInUrl should say LinkedIn profile URL
• VideoUrl should say Video URL
• tags should say Tags
• Legal should say Legal agreement accepted
• GDPRTitle should say GDPR
• GDPRTextArea should say GDPR terms to be shown to users

Also, it would be necessary to have some kind of validation for extra_field.variable + extra_field.item_type to be unique, otherwise we end up with several fields with the same name.

But for alpha 5, we need at least the fix to remove the duplicate organisationemail.

[christianbeeznest]

It is checked with this PR #6884

Thanks for confirmation.