users_selected keep new (#255)

用户组保存后数据显示的问题，在已选用户处显示选择的数据

templates/juser/group_add.html

@@ -55,6 +55,9 @@
                                 <div class="col-sm-3">
                                     <div>
                                         <select id="users_selected" name="users_selected" class="form-control m-b" size="12"  multiple>
+                                            {% for user in users_selected %}
+                                                <option value="{{ user }}">{{ user|to_name }}</option>
+                                            {% endfor %}
                                         </select>
                                     </div>
                                 </div>
@@ -118,4 +121,4 @@ $(document).ready(function(){
 
 
 </script>
-{% endblock %}
\ No newline at end of file
+{% endblock %}