unset changes.visible when forcing visibility during no-effect desk flip

this is set for new clients and creates visibility issues on startup

src/bin/e_desk.c

@@ -886,6 +886,7 @@ _e_desk_hide_begin(E_Desk *desk, int dx, int dy)
           {
              ec->hidden = 1;
              evas_object_show(ec->frame);
+             ec->changes.visible = 0;
              evas_object_hide(ec->frame);
           }
         e_client_comp_hidden_set(ec, EINA_TRUE);