Methods which operate on a collection of `ISkinnableDrawable`s are now
plural; ones which take a single item are singular.
This also allows cutting down the name of `getClosestAnchorForDrawable`
to just `getClosestAnchor`.
The goal of the visibility increase is to help in cases where timing is
an issue (by showing the approach circle etc.). This doesn't need to
apply to catch.
@smoogipoo interested as to whether you agree with this one. Visually it
looks better to me but it does change the behaviour for only osu!catch,
so I'm not 100% confident on it.
Closes#13367.