Use mix of medium and small grid clases on dashboard example

docs/examples/dashboard/index.html

@@ -55,7 +55,7 @@
 
     <div class="container-fluid">
       <div class="row">
-        <div class="col-sm-3 sidebar">
+        <div class="col-sm-3 col-md-2 sidebar">
           <ul class="nav nav-sidebar">
             <li class="active"><a href="#">Overview</a></li>
             <li><a href="#">Reports</a></li>
@@ -75,7 +75,7 @@
             <li><a href="">Another nav item</a></li>
           </ul>
         </div>
-        <div class="col-sm-9 col-sm-offset-3 main">
+        <div class="col-sm-9 col-sm-offset-3 col-md-10 col-md-offset-2 main">
           <h1 class="page-header">Dashboard</h1>
 
           <div class="row placeholders">