UX: Add a description for scores

app/assets/javascripts/discourse/templates/components/reviewable-item.hbs

@@ -1,7 +1,7 @@
 <div class='reviewable-item {{customClass}}' data-reviewable-id={{reviewable.id}}>
   <div class='reviewable-meta-data'>
     <span class='reviewable-type'>{{reviewable.humanType}}</span>
-    <span class='badge-notification new-posts score' title={{i18n "review.scores.score"}}>{{format-score reviewable.score}}</span>
+    <span class='badge-notification new-posts score' title={{i18n "review.scores.about"}}>{{format-score reviewable.score}}</span>
     {{#if reviewable.reply_count}}
       <span class='reply-count'>{{i18n "review.replies" count=reviewable.reply_count}}</span>
     {{/if}}

app/assets/javascripts/discourse/templates/components/reviewable-score.hbs

@@ -12,7 +12,7 @@
   <td>
     {{d-icon rs.score_type.icon}}
     {{title}}
-    <span class="badge-notification new-posts score">{{format-score rs.score}}</span>
+    <span class="badge-notification new-posts score" title={{i18n "review.scores.about"}}>{{format-score rs.score}}</span>
   </td>
   <td>
     {{format-date rs.created_at format="tiny"}}

config/locales/client.en.yml

@@ -431,6 +431,7 @@ en:
       conversation:
         view_full: "view full conversation"
       scores:
+        about: "This score is calculated based on the trust level of the reporter, the accuracy of their previous flags, and the priority of the item being reported."
         score: "Score"
         date: "Date"
         type: "Type"