title: squash more then two commits in sourcetree?
body: <p>I have a large number of commits, about 20, that I've done since my last push to origin/master.  I have never had more than one branch, master, and all commits were done on master.  How can I squash all 20 commits into one commit, preferably using sourcetree?  I want to do this so I can just push one commit to origin/master.</p>
  
  <p>In sourcetree I have figured out to use the interactive rebase command in the repository menu.  It brings up the exact list of commits I want to squash.  I tried hitting the squash button repeatedly until it shows one commit containing all of them.  But when I hit OK I end up with only the two most recent commits squashed.  So even though the dialog seems to show it can squash multiple in practice I can't get it to work.</p>