Fix a cosmetic UI issue where -0.0 is displayed when clicking the Calibrate using last play button.
Removed changes to AudioOffsetAdjustControl and added check to ToStandardFormattedString for if floatValue is 0
As proposed in https://github.com/ppy/osu/discussions/33572.
Note that this won't work if you leave to song select. We could make
that work but it would require further global faffing and I don't think
it's worth the effort.