a {lockedrange} variable#300

basically something to lock with {range}
it can work something like {range:1-3}{lockedrange:yes|no|yes yes}[lockedrange]
ik we can do {choose:1|2|3} instead of range but it will be more convenient for higher numbers

#405 - related

with the {weightedchoose:} variable, it is highly unlikely this is really as useful as it was before