Merge branch 'hotfix/buttons-prefix'

Author: wenzhixin

options/buttons-prefix.html

@@ -1,7 +1,7 @@
 <script>
   init({
     title: 'Buttons Class',
-    desc: 'Use `buttonsPrefix: \'btn btn-sm\'` option to defines the prefix of table buttons.',
+    desc: 'Use `buttonsPrefix: \'btn-sm btn\'` option to defines the prefix of table buttons.',
     links: ['bootstrap-table.min.css'],
     scripts: ['bootstrap-table.min.js']
   })
@@ -14,7 +14,7 @@
   data-show-refresh="true"
   data-show-columns="true"
   data-show-fullscreen="true"
-  data-buttons="btn btn-sm"
+  data-buttons-prefix="btn-sm btn"
   data-url="json/data1.json">
   <thead>
     <tr>