Blender Git Loki

Fix for 'handle_type' submenu in Graph Editor no longer working.
Previous commit fixing rest of handle type keymaps renamed this
operator, but that brings it out of line with rest of animation editor
operators, so reverting that fix.

Also, made Action Editor/DopeSheet use same hotkey as Graph Editor for
setting handle types now (which is same as one used in 3D-View).