elm_notify: added the notify's edje of popup smart member

Summary: after popup layout refactoring, the popup object cant get evas event.

Test Plan:
1. added popup object.
2. key down event callback add for popup object.
3. run the elementary_test.
4. input some key on popup and check whether the registered function is executed or not.

Reviewers: seoz, eunue, Hermet

Reviewed By: Hermet

Differential Revision: https://phab.enlightenment.org/D1688

legacy/elementary/src/lib/elm_notify.c

@@ -449,6 +449,7 @@ _elm_notify_evas_object_smart_add(Eo *obj, Elm_Notify_Data *priv)
    priv->allow_events = EINA_TRUE;
 
    priv->notify = edje_object_add(evas_object_evas_get(obj));
+   evas_object_smart_member_add(priv->notify, obj);
 
    evas_object_event_callback_add
      (obj, EVAS_CALLBACK_RESTACK, _restack_cb, obj);