Closes https://github.com/ppy/osu/issues/36703. It was only broken via keyboard hotkeys and not via the sample popover because the sample popover has a separate copy of the logic that didn't have the bug. Compare: https://github.com/ppy/osu/blob/13aeed15f95fa6585ff01eedaccc43b28ff656cb/osu.Game/Screens/Edit/Compose/Components/Timeline/SamplePointPiece.cs#L473-L475 I considered splitting a helper to have one copy of the logic but it's not very simple to do compared to a two-liner fix so I gave up.
[Solo]
IFocusManager