Fix #35267: cmd+v, cmd+c on OS X for copy/paste worked in some editors like the 3D
view and text editor but not in the animation editors, node editor and sequencer.

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@56661 954f8c5b-7b00-dc11-b283-0030488c597c