Editor: Turn on triple-quoted-string folding for all Python documents.

https://bugs.activestate.com/show_bug.cgi?id=83796
Anyone who doesn't want this (and I can't see why), can use the macro
given in the bug to turn it off.

Providing a pref for this is overkill.

(integrated from komodo (trunk) change 85518 by ericp)

git-svn-id: http://svn.openkomodo.com/repos/openkomodo/trunk@14386 b87d16e7-d29f-4ee1-b5ec-817d645d335f