[client] Push client on stack list on manage

Signed-off-by: Julien Danjou <julien@danjou.info>

client.c

@@ -413,6 +413,8 @@ client_manage(xcb_window_t w, xcb_get_geometry_reply_t *wgeom, int screen)
     client_list_push(&globalconf.clients, c);
     /* Append client in history: it'll be last. */
     focus_client_append(c);
+    /* Push client in stack */
+    stack_client_push(c);
 
     widget_invalidate_cache(c->screen, WIDGET_CACHE_CLIENTS);
     ewmh_update_net_client_list(c->phys_screen);