Follow up to 1bdd59b18c2d1b2409d0422a60e8c007053202df, to better position the...

Follow up to 1bdd59b18c2d1b2409d0422a60e8c007053202df, to better position the sidebar so the potential scrollbar doesn't get hidden by the navbar

docs/examples/dashboard/dashboard.css

@@ -29,12 +29,12 @@ body {
 @media (min-width: 768px) {
   .sidebar {
     position: fixed;
-    top: 0;
+    top: 51px;
     bottom: 0;
     left: 0;
     z-index: 1000;
     display: block;
-    padding: 70px 20px 20px;
+    padding: 20px;
     overflow-x: hidden;
     overflow-y: auto; /* Scrollable contents if viewport is shorter than content. */
     background-color: #f5f5f5;