Regressed in #10696. The old `IsFirstHideableObject()` method did not
consider nested hitobjects, while its replacement -
`IsFirstAdjustableObject()` - did. Therefore, spinner ticks could be
considered first adjustable objects, breaking the old logic.
There is no need to match over `SpinnerBonusTick`, as it inherits from
`SpinnerTick`.
4d739f11a8