Is your feature request related to a problem? Please describe.

Discussing authorship with @agustibr regarding Amends #2292 we found a problem that brings about the authorship of "official" proposals. This is the problema. Aparently when admins create a proposal these are shown without authorship, or said otherwise: "official" proposal have no-author or the author filed empty. If someone makes an amend to a proposal of this type, when merging authors, the amender becomes the only author and the proposal stops being "official", in other words: the "official" authorship is lost.

A related problem is that the term "official" doesn't really capture what admin-generated proposals are, because on a participatory process all the proposals are equally "official".

Also we are still currently lacking the possibility of converting Meetings to become authors of proposals (see #3801)

Describe the solution you'd like

• The most appropriate solution seems to be that "official" proposals get the Organization as author.
• The navigation filter should then distinguish this special type of author (the Organization) as different from the rest of authorships, also Meeting should become authors (see Create proposals whose author is a meeting #3801)

Describe alternatives you've considered

Nothing else came to my mind.

Does this issue could impact on users private data?

No.