fix length

replay-dashboard.html

@@ -24,13 +24,13 @@
         <div class="col-lg-3">
             <input type="password" class="form-control" id="password" value="" placeholder="password">
         </div>
-        <div class="col-lg-2">
+        <div class="col-lg-1">
             <button class="btn btn-default" id="empty_button">清空记录</button>
         </div>
-        <div class="col-lg-2">
+        <div class="col-lg-1">
             <button class="btn btn-default" id="pack_button">打包下载录像</button>
         </div>
-        <div class="col-lg-4">
+        <div class="col-lg-2">
             <button class="btn btn-default" id="open_button">刷新</button>
             共有<span id="num">0</span>场决斗
         </div>