Hi. There are issue for subject: http://bugs.python.org/issue1207589
It has patches, implemented well and committed.
I've pushed it to versions 2.7, 3.2, 3.3 and 3.4.

My thoughts are: the issue is not brand new subject but improvement for current IDLE functionality.
Added code cannot break any existing program/library I hope, it's related to humans who use IDLE only.
It is desirable feature and probably IDLE users will be ok with new items in context menu even they are still 2.7 users.

There are another opinion: it is new feature, not a bug, and the patch should be applied to 3.4 only.

If you look on discussion for issue (http://bugs.python.org/issue1207589) you can see we cannot make decision, votes are split.

I want to raise the question on this mailing list (as Terry Reedy suggested) to ask for community opinion.

Thanks, Andrew Svetlov