AJAX call for getting commits should be asynchronous to prevent freezing page (fix included)

[Cinc]

With our current setup the query call to get the changelog is very slow. It may need up to 20 seconds which is related to network, database and SVN config which can't be changed. During this time span the ticket page is frozen.

The cause for this is the setup of the AJAX call in /0.12/ticketlog/htdocs/ticketlog.js where for some reason the async flag is set to false.

After setting this to true the ticket page remains usable while in the background the changelog is loaded.

    $.ajax({
	        type: 'POST',
	        url: base_url + "/ticketlog/query",
	        data: JSON.stringify(data),
	        contentType: "application/json",
	        cache: false,
	        async: false, <------------- should be 'true'
	        dataType: 'json',
	        success: onQuerySuccess,
	        error: onQueryError
	    });

[Ryan J Ollos]

In 14528:

0.2dev: Use async request. Fixes #12265.

Untested patch by Cinc.

[Cinc]

I successfully tested the updated plugin [14528] with Trac 0.12.3.

Thanks for applying the fix.