ajax progress should be shown where content will be changed

[Alexander Sack]

attached screenshot I get when clicking on Output apparently while it retrieves the data from server (after a while i get the log there).

I think in general we should somehow support binding ajax requests to html divs something that then would maybe grey out while updating and show a progress spinner.

... at best something like a text scrollfield would continue to be operational in such a grey area if thats technically feasible.

note: obviously i propose a solution; in the end the symptom needs to be fixed that the user sees a page and doesn't know that and where content will change.
note: this is about finding a better way to do it than the old AJAX bar floating on top. Important for me is really indication where on the HTML page new content will show up.