Feature Request: Walk Speed as SPM (steps per minute) instead of percentages

I am constantly having to convert steps per minute to the arbitrary step percentage (which I calculated as roughly 120 steps per minute at 100%). For music videos, it could be nice to just type the exact steps per minute that someone would want into the step speed to match the tempo of the song.

I think this feature could even leak into the motion library. I know most of the speeds in the motion library vary (especially dancing) but I think if there was a base speed for all motion library dances and walks then it would be helpful.