[Ideas] Add Waiting message when the page is loading

Show a "Waiting content loading" with Icon spinning on page load...... similar to the Ajax yellow spinning message.

Have this work like a popup so the page behind is visible but can't be accessed.

Currently to make this happen I have to bypass the Page Preparation.... then show a popup with the message.... then notify the calling page to refresh the queries... 

Would be nice to be able to show the "Waiting" easier.