This makes a number of operators no longer ask for confirmation, rather it will show an info message after performing the operation. Ref T37422 for decision. In particular, these were changed: * Delete objects, bones, keyframes, masks, mask curves, motion tracks, markers. * Clear and delete keyframes in the 3D view. * Align bone to parents. * Separate bones from armature. * Group/ungroup metastrips in sequencer. * Copy/paste objects to/from buffer. Reviewed By: brecht, dingto Differential Revision: http://developer.blender.org/D35