优化代码

web/views/@default/clusters/cluster/node/detail.html

@@ -209,7 +209,7 @@
             </tr>
         </tbody>
         <tbody>
-            <tr>
+            <tr v-if="node.status.buildVersion != null && node.status.buildVersion.length > 0">
                 <td>版本</td>
                 <td>v{{node.status.buildVersion}}
                     &nbsp; <a :href="'/clusters/cluster/upgradeRemote?clusterId=' + clusterId" v-if="shouldUpgrade"><span class="red">发现新版本v{{newVersion}} &raquo;</span></a>

web/views/@default/clusters/cluster/node/install.html

@@ -24,7 +24,7 @@
     <h4>方法2：手动安装</h4>
     <table class="ui table definition selectable">
         <tr v-if="installerFiles != null && installerFiles.length > 0">
-            <td>安装文件</td>
+            <td class="title">下载安装文件</td>
             <td>
                 <table class="ui table celled">
                     <thead class="full-width">