unset E_Client->want/take_focus flags in hide callback

deferred focus should no longer be valid if a client has been hidden
before the focus-set could be triggered

fixes super fun infinite loop with desk flips

src/bin/e_client.c

@@ -1402,6 +1402,7 @@ _e_client_cb_evas_hide(void *data, Evas *e EINA_UNUSED, Evas_Object *obj EINA_UN
         if (ec->focused)
           _e_client_revert_focus(ec);
      }
+   ec->want_focus = ec->take_focus = 0;
 
    ec->post_show = 0;