Implement Keyboard Navigation Controls for All Sliders

Nestable sliders have the option to control whether keyboard navigation happens: not at all, only when focused or all the time (see screenshot). However, other slider widgets (testimonial slider, carousel, or (simple) slider) don’t have this same functionality. Would be nice to have this control on all slider elements as the default seems to be “Global” which means all those sliders will move when pressing the arrow keys at any time.