Editor: Speed up handling of handling newline keypresses in large HTML/XML files
http://bugs.activestate.com/show_bug.cgi?id=100371
r=toddw
rn=

(integrated from komodo (trunk) change 82514 by ericp)

git-svn-id: http://svn.openkomodo.com/repos/openkomodo/trunk@13805 b87d16e7-d29f-4ee1-b5ec-817d645d335f