Hello Lee

I am sorry to disappoint you, but unfortunately something like this cannot be achieved with the plugin's built in features.

Every server-side table which has a lot of data is showing the loading circle before the table is loaded, though. I took a look at your page, and saw that it is a small table, so the time it takes for the table do display is actually an Admin-Ajax call being returned.

Maybe you can add the spinning wheel using some JS, but that isn't covered by support.

Best regards.