Also add a nice method to get the field name from a structure.
Also fix some restructured text formatting.

Upgraded the module version.
Updated the change log.

fields in their views, to adapt the code to Odoo 13.

This way Odoo does not have to do it; it would otherwise display warnings when
parsing code blocks.

These fields will be renamed when used.
When not used however, we don't want these names to lead to "multiple fields
have the same label" warnings.

Updated the translations.

Behind-the-scenes objects; main object security rules are enough.

Will be done better (more cases handled, more comments) by grafting rev
d11003bb260b.