Adjust to hide password when required

app/views/admin/site_panel/edit_server_info.html.erb

@@ -139,7 +139,7 @@
           <div class="control-group">
             <label class="control-label muted" for="password">Password:</label>
             <div class="controls">
-              <%= f.text_field :password,{:id=>'password'} %>
+              <%= f.password_field :password, { :id => 'password', :value => @site_server.password.present? ? "********" : nil, :placeholder => t('client_management.password_placeholder', default: '') } %>
             </div>
           </div>
         </div>