You can use the empty object on the dashboard, which will disable select option on the view.
Is there any alternate option available?
Not sure if there's any alternate option available, this is only thing I have used in my reports.
I used floating blank object, it is suitable for using only one filter or without any filter using in your report. In my report i used many filters and that case it is not suitable because based on the filter the data might be changed i couldn't able to use the scroll down option in that report.