title: TFS Team Query: get all changed work items since a given time
body: <p>Apparently it is impossible to provide the Changed Date field with a timestamp (format '2009-12-14 10:00:00') when defining a new Team Query. I get the error: "The query failed. You cannot supply a time with the date when running a query using date precision.".</p>
  
  <p>Is there a workaround for this? I just want a list of work items which are changed since the last 'x' minutes.</p>