Add attachtop patch

dwl.c

@@ -1801,7 +1801,22 @@ mapnotify(struct wl_listener *listener, void *data)
 	c->geom.height += 2 * c->bw;
 
 	/* Insert this client into client lists. */
-	wl_list_insert(&clients, &c->link);
+#if ATTACHTOP_PATCH
+	i = 0;
+	wl_list_for_each(w, &clients, link) {
+		if (!VISIBLEON(w, selmon) || c->isfloating)
+			continue;
+		p = w;
+		if (++i >= selmon->nmaster)
+			break;
+	}
+	if (i > 0)
+		wl_list_insert(&p->link, &c->link);
+	else
+		wl_list_insert(&clients, &c->link);
+#else
+    wl_list_insert(&clients, &c->link);
+#endif // ATTACHTOP_PATCH
 	wl_list_insert(&fstack, &c->flink);
 
 	/* Set initial monitor, tags, floating status, and focus: