UX: Adjust topic list item spacing (#70)

assets/stylesheets/common/docs.scss

@@ -123,7 +123,7 @@
   .docs-topic-list {
     flex-basis: 100%;
 
-    th {
+    .topic-list-header .topic-list-data {
       min-width: 5em;
 
       &[role="button"] {
@@ -139,6 +139,10 @@
       }
     }
 
+    .topic-list-data:last-of-type {
+      text-align: center;
+    }
+
     .badge-wrapper .badge-category .category-name {
       // extra protection for ultra-long category names
       max-width: 30vw;