Send wl_surface.enter for ext-session-lock surfaces

sway/lock.c

@@ -31,6 +31,7 @@ static void handle_surface_map(struct wl_listener *listener, void *data) {
 	if (server.session_lock.focused == NULL) {
 		set_lock_focused_surface(surf->surface);
 	}
+	wlr_surface_send_enter(surf->surface, surf->output->wlr_output);
 	output_damage_whole(surf->output);
 }