Centered title in the moderation page

app/assets/stylesheets/moderations.sass

 h2.warning
   color: red
 
-body.moderations h3
-  text-align: center
-
 .moderations, .notes
   table.list
     margin-top: 2em
     margin-bottom: 2em
+    thead
+      h3
+        text-align: center
     td
       padding-top: 0.5em
       padding-bottom: 0.5em