Also, make migration wizard show for 5 seconds (with a Finish button to dismiss) when automigrating, so the user can see what's happening.
for full details see http://bugzilla.mozilla.org/show_bug.cgi?id=203077#c35
r=jst
git-svn-id: svn://10.0.0.236/trunk@153855 18797224-902f-48f8-a5cc-f745e15eee43