remove duplicate random text gen

randomText by default
length set to 8

web/html/xui/form/client.html

@@ -16,7 +16,7 @@
                 <template slot="title">
                     <span>{{ i18n "pages.inbounds.emailDesc" }}</span>
                 </template>
-                <a-icon type="sync" @click="getNewEmail(client)"></a-icon>
+                <a-icon @click="client.email = RandomUtil.randomText()" type="sync"> </a-icon>
             </a-tooltip>
         </span>
         <a-input v-model.trim="client.email" style="width: 200px;"></a-input>