Possible modification to issuing Working Group Last Calls from the datatracker

[Robert Sparks <[e-mail]>]

The recent change to the datatracker to send email as a side effect of 
putting a document in working group last call (or call for adoption 
issued) surprised several chairs, and requests have been made to make it 
obvious that mail is about to be sent, and allow that mail to be edited 
before sending. See https://github.com/ietf-tools/datatracker/issues/9439

I have a proposal for a change to the workflow to allow this. It's 
currently running at:

https://dt-issuewglc.dev.ietf.org

That's a development instance - remember that your passwords there are 
all literally "password", and that anything you do there won't 
_actually_ send any email or make any change at all to the production 
datatracker database.

Please experiment with the workflow for issuing wglc for documents in 
your WGs - start with the edit button next to stream state - the rest is 
hopefully self explanatory.

If this approach resonates well, I'll do the same thing to issuing call 
for adoption.

(The proposed code changes are at 
https://github.com/ietf-tools/datatracker/pull/9616)

RjS