title: Where is browserNoActivityTimeout used in karma?
body: <p>I grep the <a href="https://github.com/karma-runner/karma/search?utf8=%E2%9C%93&amp;q=browserNoActivityTimeout&amp;type=" rel="nofollow noreferrer">karma repository</a> and it seems like no logic is using that field besides simply being set in the config.</p>
  
  <p>Does anyone know what is that field for?</p>
  
  <p>For some reason I have to set it to <code>20000</code> or else my karma test <code>Disconnects</code></p>