title: Discarding more than one commit in TortoiseHg
body: <p>I am using TortoiseHg.<br>
  I did a false commit, and then another false commit.<br>
  Both commits are in draft state (not yet pushed).<br>
  I want to completely ignore this commits and go back as if they where never committed.  </p>
  
  <p>Doing Rollback seems to only remove the last commit.<br>
  How can I do that simple task?</p>