Internally display simple moderator stats

[coffee2code]

In order to gauge the participation of moderators, it would be helpful to see a table of some simple moderator stats. Of course, moderating photos is not a competition so this isn't intended as a scoreboard. But it's helpful to know how active moderators have been, which can impact whether more mods are needed or if they are no longer participating.

Initially this only needs to present very basic information:

• Moderator's username (linked to their Profile)
• Moderator's display name
• Number of photos they approved
• Number of photos they rejected
• Date of most recent moderation (approval or rejection) (linked to edit that photo)

This can most simply be made available as a table in an admin dashboard widget. Only those who are administrators or fellow moderators should be able to see the widget.

[coffee2code]

In 12732:

Photo Directory: User: Add count_photos_moderated() and count_photos_rejected_as_moderator() to count photos moderated by the user.

See #7130.

[coffee2code]

In 12734:

Photo Directory, User: Add get_last_moderated() to return the most recent photo that was moderated by the user.

See #7130.

[coffee2code]

In 12735:

Photo Directory, Moderation: Add admin dashboard widget for simple moderator stats.

Fixes #7130.

[coffee2code]

In 12768:

Photo Directory, Moderation: Only link moderator's last moderated post if current user can edit it.

See #7130.

[coffee2code]

In 12791:

Photo Directory, Moderation: In Photo Moderators dashboard widget, reduce width of columns for approval/rejection counts.

See #7130.

[coffee2code]

In 12792:

Photo Directory, Moderation: In Photo Moderators dashboard widget, link non-zero approval and rejection counts to a listing of those posts.

See #7130.