Forums: Add a name to pending and archived post notices

[SergeyBiryukov]

In #2379, we've added reporter's username to "flagged as spam" notice:

This post has been flagged as spam by %s.

It would make sense to do the same for pending and archived posts:

• Pending
  • If username is available: This post was unapproved by %s.
  • If not: This post is currently pending.
• Archived
  • If username is available: This post was archived by %s.
  • If not: This post is currently archived..

At the moment, archived posts don't have any notice at all, which is inconsistent with spam and pending.

[coffee2code]

In 4890:

Support Theme: Add moderation notice for posts that are archived.

See #2474.

[SergeyBiryukov]

In 4898:

Support Theme: After [4890], adjust the logic to only show moderation notice for archived posts to moderators.

Fixes #2489. See #2474.

[SergeyBiryukov]

meta-2474.patch​ stores the username of the moderator who performed the last approve/unapprove or archive/unarchive action, and displays that data in the notice, if available.

The name of the moderator who approved or unarchived the post is not displayed anywhere at the moment (as there's no notices for normal posts), but I thought it would be helpful to keep that data for future reference, just in case.

[SergeyBiryukov]

In 4987:

Support Forums: Store moderator's username on approve/unapprove and archive/unarchive actions.

See #2474.

[SergeyBiryukov]

In 4988:

Support Theme: Add moderator's username to the notice displayed for archived and pending posts.

Fixes #2474.

[SergeyBiryukov]

In 5111:

Support Forums: In Moderators::archive_post() and ::unarchive_post(), store user_nicename instead of user_login, for consistency with [5002].

See #2474, #2493.

[SergeyBiryukov]

In 5291:

Support Forums: Move Hooks::store_moderator_username() method added in [4987] to Moderators class.

See #2474.

[SergeyBiryukov]

In 5292:

Support Forums: In Moderators::store_moderator_username(), store user_nicename instead of user_login, for consistency with [5002] and [5111].

See #2474, #2493.

[SergeyBiryukov]

In 5293:

Support Forums: Use Moderators::store_moderator_username() in ::archive_post() and ::unarchive_post().

See #2474.