Account for unsorted class

Author: flyingL123

dist/min.js

@@ -12,5 +12,5 @@
 
 <script src="//unpkg.com/jquery@2.1.4/dist/jquery.min.js"></script>
 <script src="//unpkg.com/bootstrap@3.3.5/dist/js/bootstrap.min.js"></script>
-<script type="text/javascript" src="client.1880c24e.js"></script></body>
+<script type="text/javascript" src="client.84d95696.js"></script></body>
 </html>

examples/dist/client.1880c24e.js

@@ -20,8 +20,9 @@ export default {
     cls () {
       return [
         'fa',
-        { 'fa-sort-down': this.order === 'desc',
+        { 'fa-sort': !this.order,
           'fa-sort-up': this.order === 'asc',
+          'fa-sort-down': this.order === 'desc',
           'text-muted': !this.order
         }
       ]