优化登录界面。

src/client/Login.vue

@@ -134,8 +134,8 @@
                 <div class="clear" />
               </div>
               <div class="clearfix" />
-              <div class="separator" />
               <div v-if="authSetting != null && authSetting.length > 0">
+                <div class="separator" />
                 <div class="other-login-method">其他登录方式</div>
                 <div class="login-third-box">
                   <div class="login-third">