Push headings down a bit

Now that there’s a bit more stuff in the service name area at the top
of the page it looks a bit cramped. Moving the heading down gives it a
bit more space to breath, and associates the heading a bit more closely
with the content after it.

app/assets/stylesheets/components/table.scss

@@ -5,7 +5,7 @@
 
 .table-heading {
   text-align: left;
-  margin: 40px 0 $gutter-half 0;
+  margin: $gutter-half 0 $gutter-half 0;
 }
 
 .dashboard-table {