title: mantis bug reporting timeout
body: <p>When I report a bug in our Mantis system I sometimes take too long to enter all the info (>5 min) and Mantis reports a timeout when I finally hit the "Submit report" button.
  Hitting BACK doesn't always work, either I lose everything I have typed or resubmitting still doesn't work (same error).</p>
  
  <p>Question: why is this "feature" there and is there a way to either disable it or make it (a lot) longer timeout?</p>
  
  <p>We're using Mantis 1.2.3</p>