Enable users to set up a default signature / message footer

[RichardTaylor]

eg. see the signature/footer at

https://www.whatdotheyknow.com/request/impact_of_covid_19_on_foi_respon_23#outgoing-1281900

Related:

• Add optional organisation / affiliation field for users #2921
• Allow users, or at least administrators, to set up a standard footer for their annotations #6157 (for annotations not messages)

[garethrees]

Some of parts of this are discussed in #285 (comment), though that was more intended as what name you sign off with rather than a large free text field. I'd favour something pretty short to avoid the inclusion of substantial extraneous material in the signature.

Maybe a limit of ~80-140 characters would be good.

[HelenWDTK]

This issue has been automatically closed due to a lack of discussion or resolution for over 12 months.
Should we decide to revisit this issue in the future, it can be reopened.