Roulettewheel Selection of Rules may cause a single rule to be selected over and over again (despite randomness)

[heidmic]

As it stands, there might be a situation where only a single (or very few) rule fulfills the non-infinity criterion. We might want to find a way to allow the selection of those very small rules in those cases

_Originally posted by @heidmic in https://github.com/heidmic/suprb/pull/124#discussion_r958750377_