Board Editor needs an option to change move number and/or reset it to 1

I use the Board Editor to set up a position, then go to Analysis Board and select Practice With Computer. (In this case, I'm practicing mate with Knight and Bishop). Then after a few moves (say 20) I want to reset it and try again, so I go back to the Board Editor to set it up again, and go to Analysis Board and Practice With Computer again. But this time, my first move is #21, because I left off at 20 last time. And then after I do 30 moves, I hit the 50 move limit and it won't let me make any more moves. There seems to be no way to change the move number or reset it to 1. I think the Board Editor needs an option for "Move Number". Or maybe the Analysis Board could have a "Reset" button to start over. Also, it would be nice to have an option to disable the 50-move limit so I could keep practicing without having to reset.

The board editor allows you to set the FEN. The last number is the move you are on.

I recommend reading en.wikipedia.org/wiki/Forsyth%E2%80%93Edwards_Notation too, FEN can be a really fast way to set up a position