Made the window save the coordinates when being draged.

clients/window.c

@@ -1018,15 +1018,17 @@ handle_configure(void *data, struct wl_shell *shell,
 	window->pending_allocation.width = width;
 	window->pending_allocation.height = height;
 
-	if (!(edges & 15))
-		return;
-
+	if (edges & WINDOW_TITLEBAR) {
+		window->allocation.x = window->pending_allocation.x;
+		window->allocation.y = window->pending_allocation.y;
+	} else if (edges & WINDOW_RESIZING_MASK) {
 		if (window->resize_handler)
 			(*window->resize_handler)(window,
 						  window->user_data);
 		else if (window->redraw_handler)
 			window_schedule_redraw(window);
 	}
+}
 
 static const struct wl_shell_listener shell_listener = {
 	handle_configure,