Update styles.css

Change overflow style from scroll to visible to avoid the scrollbar obscuring the API docs on Windows.

Author: matt-humphrey

docs/styles.css

@@ -24,7 +24,7 @@ li a {
 
 dt {
     height: 32px;
-    overflow-x: scroll;
+    overflow-x: visible;
     margin-left: -4px;
 }