title: XHR finished loading [...] log message
body: <p>I get a JavaScript console log message each time an Ajax request finishes loading; the issue is demonstrated in the attached screenshot.</p>
  
  <p><img src="https://i.stack.imgur.com/UgV9G.png" alt="enter image description here"></p>
  
  <p>I don't know how I activated this logging. How to deactivate it? I'm on ExtJS 4.1.</p>