Removed some words but also don't mention "smaller" because it's...
musically incorrect and also functionally incorrect – entering 1/[8]
will result in 1/16 also being populated for instance.
Alternate method is to expose a `SnapDistancesChanged` event in
`IPositionSnapProvider` instead, but I chose this way as an analogue to
`IBeatSnapProvider.BeatDivisor`, which might even make sense to be
exposed as `BindableBeatDivisor` instead of caching that separately.