kde-base/kcontrol-4.* should depend on kde-base/khotkeys, just as kcontrol-3.5.* did. khotkeys allows to define hotkeys for arbitrary actions. According to kde.org it's still not fully functional though, see also http://bugs.kde.org/show_bug.cgi?id=160892
Good idea, fixed in kcontrol-4.2.0-r1