Discourse-moderator-attention: setting all to "reviewed", and missing icons

If the plugin hasn’t been updated for FontAwesome 5 then yes there are going to be some issues with the icons. FA5 was implemented in November/December, the only update to the plugin since then was:

https://github.com/discourse/discourse-moderator-attention/commit/9fe1ee830314af5bda247bbad207c8db1b65299b

by @gerhard and it didn’t touch FontAwesome.