fix: Skin: Only style buttons with disabled state if disabled="true"

(integrated from komodo (trunk) change 81655 by nathanr)

git-svn-id: http://svn.openkomodo.com/repos/openkomodo/trunk@13535 b87d16e7-d29f-4ee1-b5ec-817d645d335f
fix: Abyss: Go to line and similar panels not being styled
http://bugs.activestate.com/show_bug.cgi?id=100171

(integrated from komodo (trunk) change 81656 by nathanr)

git-svn-id: http://svn.openkomodo.com/repos/openkomodo/trunk@13536 b87d16e7-d29f-4ee1-b5ec-817d645d335f