History: Don't include the start page and browser tabs in the back/forward history.
http://bugs.activestate.com/show_bug.cgi?id=99529
r=toddw

(integrated from komodo (trunk) change 82057 by ericp)

git-svn-id: http://svn.openkomodo.com/repos/openkomodo/trunk@13656 b87d16e7-d29f-4ee1-b5ec-817d645d335f