Track changes: Collapse 3-color changebar margin into 1 color.
http://bugs.activestate.com/show_bug.cgi?id=102170
r=marky
Leave this bug open: these markers should just be markers written in the breakpoint margin.

(integrated from komodo (trunk) change 83721 by ericp)

git-svn-id: http://svn.openkomodo.com/repos/openkomodo/trunk@14195 b87d16e7-d29f-4ee1-b5ec-817d645d335f