Merge pull request #1579 from gscottolson/master

Improve readability of multi-line nav items.

_css/react.scss

@@ -224,10 +224,11 @@ h1, h2, h3, h4, h5, h6 {
     margin: 0;
   }
   ul ul {
-    margin-left: 20px;
+    margin: 6px 0 0 20px;
   }
   li {
-    margin: 0;
+    line-height: 16px;
+    margin: 0 0 6px;
   }
   h3 {
     text-transform: uppercase;