fix: Editor: Mac: Stop white flashes when using a dark background
http://bugs.activestate.com/show_bug.cgi?id=100251
r=marky
rn=

(integrated from komodo (trunk) change 81857 by toddw)

git-svn-id: http://svn.openkomodo.com/repos/openkomodo/trunk@13603 b87d16e7-d29f-4ee1-b5ec-817d645d335f