clean up the updated container app layout a bit

examples/container-app.html

@@ -32,7 +32,7 @@
       .content {
         background-color: #fff;
         padding: 20px;
-        margin: 0 -20px; /* negative indent the amount of the padding to maintain the grid system */
+        margin: 0 -20px 18px; /* negative indent the amount of the padding to maintain the grid system */
         -webkit-border-radius: 0 0 6px 6px;
            -moz-border-radius: 0 0 6px 6px;
                 border-radius: 0 0 6px 6px;
@@ -59,11 +59,6 @@
         padding-left: 19px;
         border-left: 1px solid #eee;
       }
-
-      .topbar .btn {
-        border: 0;
-      }
-
     </style>
 
     <!-- Le fav and touch icons -->