Add ability to archive a merge proposal

[Mitchell Dzurick]

It'd be nice to be able to archive a merge proposal.

The main reason for this is to retain the conversation that happens in an MP, or to keep the state of an MP for reference.

[Quentin Debhi (ruinedyourlife)]

Currently, you have the option to change the status of a MP to either "Rejected" or "Merged". By doing so, the MP, along with its content and state, will remain accessible.

Should there be a scenario where you no longer wish to keep a MP, you can delete said MP.

Do these capabilities meet your requirements?

[Mitchell Dzurick (mitchdz)]

Do you need to have special permissions to set an MP to Rejected?

I'm looking at https://code.launchpad.net/~mitchdz/ubuntu/+source/multipath-tools/+git/multipath-tools/+merge/454916 and I can only choose the following 3 options:

* Work in progress
* Needs review
* Merged

[Quentin Debhi (ruinedyourlife)]

That is correct, you would have to be a trusted reviewer to change it to Rejected (owner, member of the review team or a LP admin).

Note that an existing feature request exists for users to reject their own MP:
https://bugs.launchpad.net/launchpad/+bug/2044543

[Mitchell Dzurick (mitchdz)]

Ah wonderful. I commented on 2044543 that I would like it. Feel free to reject this bug.

[Quentin Debhi (ruinedyourlife)]

Great! We'll update the documentation right away at https://help.launchpad.net/Code/Review to explain the current possibilities.