put buttons at the next row

replay-dashboard.html

@@ -27,24 +27,15 @@
         <div class="col-lg-3">
             <input type="password" class="form-control" id="password" value="" placeholder="password">
         </div>
-        <div class="col-lg-4">
-            <button class="btn btn-default" id="open_button">刷新</button>
-            <button class="btn btn-default" id="empty_button">清空记录</button>
-            <button class="btn btn-default" id="pack_button">打包下载录像</button>
-            共有<span id="num">0</span>场决斗
-        </div>
     </div>
-    <!--div class="row">
-        <div class="col-lg-2">
-            <button class="btn btn-default" id="empty_button">清空记录</button>
-        </div>
-        <div class="col-lg-2">
-            <button class="btn btn-default" id="pack_button">打包下载录像</button>
-        </div>
-        <div class="col-lg-2">
-            <span id="message_callback"></span>
-        </div>
-    </div-->
+</div>
+<div class="row buttons">
+    <div class="col-lg-12">
+        <button class="btn btn-default" id="open_button">刷新</button>
+        <button class="btn btn-default" id="empty_button">清空记录</button>
+        <button class="btn btn-default" id="pack_button">打包下载录像</button>
+        共有<span id="num">0</span>场决斗
+    </div>
 </div>
 <div class="container">
     <hr>