[#bugs] Fix 'wait a number of turns' command to wait (n*100/QN) turns, not n turns

If you try to refresh ability cooldown using ‘wait a number of turns’ command (=type remaining turn count, press enter) while QN is greater than 100, cooldown is not fully refreshed so you have to do it again, which is a bit of inconvenience.

Since all other commands that spend turns are affected by QN, I think it is right to fix it in terms of consistency as well.